CVE-2026-2686
📋 TL;DR
This CVE describes a remote command injection vulnerability in SECCN Dingcheng G10 software version 3.1.0.181203. Attackers can execute arbitrary operating system commands by manipulating the 'User' parameter in the session_login.cgi endpoint. Organizations using this specific version of the SECCN Dingcheng G10 product are affected.
💻 Affected Systems
- SECCN Dingcheng G10
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary commands with system privileges, install malware, exfiltrate data, or pivot to other systems.
Likely Case
Remote code execution leading to data theft, system disruption, or deployment of ransomware.
If Mitigated
Limited impact if proper network segmentation, web application firewalls, and input validation are in place.
🎯 Exploit Status
Public proof-of-concept available on GitHub demonstrates exploitation. The vulnerability requires no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch available. Check with SECCN vendor for updated version or security advisory.
🔧 Temporary Workarounds
Block CGI endpoint
linuxBlock access to the vulnerable /cgi-bin/session_login.cgi endpoint using firewall rules or web server configuration.
iptables -A INPUT -p tcp --dport 80 -m string --string "/cgi-bin/session_login.cgi" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "/cgi-bin/session_login.cgi" --algo bm -j DROP
Implement WAF rules
allDeploy web application firewall rules to detect and block command injection attempts targeting the User parameter.
🧯 If You Can't Patch
- Isolate affected systems in a segmented network zone with strict outbound traffic controls.
- Implement network-based intrusion detection to monitor for command injection patterns and shell execution attempts.
🔍 How to Verify
Check if Vulnerable:
Check if the system runs SECCN Dingcheng G10 version 3.1.0.181203 and has the /cgi-bin/session_login.cgi endpoint accessible.Check Version:
Unknown - check system documentation or vendor-specific methods.Verify Fix Applied:
Verify the endpoint is no longer accessible or that input validation prevents command injection. Test with safe payloads like 'test;echo vulnerable'.📡 Detection & Monitoring
Log Indicators:
- Unusual CGI requests to session_login.cgi with special characters in User parameter
- System logs showing unexpected command execution or shell spawns
Network Indicators:
- HTTP requests containing shell metacharacters (;, |, &, $, etc.) in User parameter
- Outbound connections from the device to unexpected destinations
SIEM Query:
source="web_logs" AND uri="/cgi-bin/session_login.cgi" AND (user="*;*" OR user="*|*" OR user="*&*" OR user="*`*" OR user="*$(*")