CVE-2025-7094
📋 TL;DR
A critical stack-based buffer overflow vulnerability in Belkin F9K1122 routers allows remote attackers to execute arbitrary code by manipulating the submit-url-ok parameter in the formBSSetSitesurvey function. This affects all users of Belkin F9K1122 version 1.00.33 routers with the vulnerable firmware. Attackers can exploit this without authentication to potentially take full control of affected devices.
💻 Affected Systems
- Belkin F9K1122
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, lateral movement to internal networks, installation of persistent malware, and creation of botnet nodes.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept network traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering, though internal exploitation remains possible.
🎯 Exploit Status
Public proof-of-concept exploit code is available on GitHub, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available - vendor did not respond to disclosure
Restart Required: Yes
Instructions:
No official patch available. Monitor Belkin's security advisories page for updates. If a patch becomes available, download from official Belkin support site and follow firmware update instructions.
🔧 Temporary Workarounds
Network Segmentation and Access Control
allIsolate affected routers in separate network segments and restrict access to management interfaces
Disable Remote Management
allTurn off remote management features if enabled
🧯 If You Can't Patch
- Replace affected devices with supported models from vendors providing security updates
- Implement strict network segmentation to isolate vulnerable routers from critical assets
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface (typically under Advanced > Administration > Firmware Update) or via SSH if enabled: cat /proc/versionCheck Version:
Check web interface or use: ssh admin@router-ip 'cat /proc/version' (if SSH enabled)Verify Fix Applied:
Verify firmware version is no longer 1.00.33. Check that no newer vulnerable versions exist.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/formBSSetSitesurvey
- Large or malformed submit-url-ok parameter values
- Router crash or reboot logs
Network Indicators:
- HTTP POST requests to router IP on port 80/443 with formBSSetSitesurvey endpoint
- Unusual outbound connections from router after exploitation
SIEM Query:
source="router_logs" AND (uri="/goform/formBSSetSitesurvey" OR uri CONTAINS "formBSSetSitesurvey")