CVE-2025-7084
📋 TL;DR
A critical stack-based buffer overflow vulnerability in Belkin F9K1122 routers allows remote attackers to execute arbitrary code by manipulating the pinCode parameter in the formWpsStart function. This affects Belkin F9K1122 routers running firmware version 1.00.33. 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, persistent backdoor installation, and data exfiltration.
Likely Case
Device takeover enabling network traffic interception, DNS hijacking, credential theft, and participation in botnets.
If Mitigated
Limited impact if device is isolated, but still vulnerable to denial of service or limited data exposure.
🎯 Exploit Status
Proof of concept code is publicly available on GitHub. The vulnerability requires no authentication and has straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: Yes
Instructions:
1. Check Belkin website for firmware updates. 2. If update available, download and install following vendor instructions. 3. Reboot device after installation. Note: No official patch is currently known.
🔧 Temporary Workarounds
Disable WPS functionality
allDisable Wi-Fi Protected Setup (WPS) feature to prevent access to the vulnerable endpoint
Network segmentation
allIsolate affected routers in separate network segments to limit potential lateral movement
🧯 If You Can't Patch
- Replace affected devices with non-vulnerable models
- Implement strict network access controls and firewall rules to block external access to router management interfaces
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at http://routerlogin.net or http://192.168.1.1. Navigate to Advanced > Administration > Firmware Update.Check Version:
curl -s http://192.168.1.1/ | grep -i firmware or check web interfaceVerify Fix Applied:
Verify firmware version is no longer 1.00.33. Check that WPS functionality is disabled if using workaround.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/formWpsStart
- Multiple failed WPS attempts
- Unexpected device reboots or crashes
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns suggesting command and control communication
- Port scanning originating from router
SIEM Query:
source="router.log" AND (uri="/goform/formWpsStart" OR message="WPS" OR message="buffer overflow")