CVE-2025-4998
📋 TL;DR
This vulnerability in H3C Magic R200G routers allows remote attackers to cause denial of service by manipulating parameters in specific HTTP POST requests. Affected users are those running vulnerable firmware versions on these routers, potentially disrupting network connectivity.
💻 Affected Systems
- H3C Magic R200G
⚠️ 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
Complete router unavailability requiring physical reset or replacement, disrupting all network services for connected devices.
Likely Case
Temporary service disruption affecting Wi-Fi and network connectivity until router restart.
If Mitigated
Minimal impact if routers are behind firewalls with restricted HTTP access or if vulnerable endpoints are blocked.
🎯 Exploit Status
Exploit details are publicly available on GitHub. The vulnerability requires sending crafted HTTP POST requests to specific endpoints.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Monitor H3C security advisories for updates. Consider upgrading to newer router models if available.
🔧 Temporary Workarounds
Block Vulnerable Endpoints
linuxUse firewall rules to block access to /goform/aspForm endpoints
iptables -A INPUT -p tcp --dport 80 -m string --string "/goform/aspForm" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "/goform/aspForm" --algo bm -j DROP
Disable Web Management Interface
allTurn off remote web management if not required
🧯 If You Can't Patch
- Place routers behind firewalls with strict inbound rules, allowing only necessary management IPs
- Change default credentials and implement strong authentication for management interfaces
🔍 How to Verify
Check if Vulnerable:
Check firmware version via router web interface at System Status > Firmware Version. If version is 100R002 or earlier, device is vulnerable.Check Version:
curl -s http://router-ip/ | grep -i firmware || Check web interface manuallyVerify Fix Applied:
No fix available to verify. Monitor for firmware updates from H3C.📡 Detection & Monitoring
Log Indicators:
- Multiple HTTP POST requests to /goform/aspForm with unusual parameters
- Router reboot events or service disruption logs
Network Indicators:
- HTTP traffic to router on ports 80/443 containing strings like Edit_BasicSSID, SetAPWifiorLedInfoById, or AddMacList
SIEM Query:
source="router_logs" AND (url="/goform/aspForm" OR method="POST") AND (param="Edit_BasicSSID" OR param="SetAPWifiorLedInfoById")