CVE-2025-6091
📋 TL;DR
A critical buffer overflow vulnerability in H3C GR-3000AX routers allows remote attackers to execute arbitrary code by manipulating parameters in the UpdateWanParamsMulti/UpdateIpv6Params functions. This affects organizations using H3C GR-3000AX routers with firmware version V100R007L50. The vendor acknowledges the issue but considers risk low and has no immediate remediation plans.
💻 Affected Systems
- H3C GR-3000AX
⚠️ 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
Remote code execution leading to complete device compromise, network infiltration, and lateral movement to other systems.
Likely Case
Device takeover enabling network traffic interception, credential theft, and persistent backdoor installation.
If Mitigated
Denial of service causing router instability or reboot if exploit fails to achieve code execution.
🎯 Exploit Status
Exploit code is publicly available on GitHub, making attacks straightforward for threat actors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None
Vendor Advisory: None
Restart Required: No
Instructions:
No official patch available. Vendor has no immediate remediation plans.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected routers in separate VLANs with strict firewall rules to limit attack surface.
Access Control
allBlock external access to router management interfaces using firewall rules.
🧯 If You Can't Patch
- Replace affected routers with different models or vendors that receive security updates.
- Implement network monitoring and intrusion detection specifically for buffer overflow attempts against these devices.
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface or SSH: show version | include V100R007L50Check Version:
show versionVerify Fix Applied:
No fix available to verify. Monitor for firmware updates from H3C.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /routing/goform/aspForm with long parameter values
- Router crash/reboot logs
Network Indicators:
- Traffic spikes to router management interface
- Unusual outbound connections from router
SIEM Query:
source="router_logs" AND (uri="/routing/goform/aspForm" AND param_length>1000)