CVE-2022-45725
📋 TL;DR
This vulnerability allows remote attackers on the same network to execute arbitrary code on Comfast CF-WR6110N routers via HTTP POST requests due to improper input validation. Attackers can gain full control of affected routers without authentication. Only users of this specific router model and version are affected.
💻 Affected Systems
- Comfast CF-WR6110N
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attackers to intercept all network traffic, install persistent malware, pivot to other devices on the network, or use the router as part of a botnet.
Likely Case
Router takeover leading to network traffic interception, DNS hijacking, credential theft, and lateral movement to connected devices.
If Mitigated
Limited impact if network segmentation isolates the router and strict access controls prevent unauthorized network access.
🎯 Exploit Status
Public research demonstrates exploitation via HTTP POST requests. No authentication required for attackers on the same network.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official advisory found
Restart Required: No
Instructions:
1. Check Comfast website for firmware updates
2. If update available, download from official source
3. Access router admin interface
4. Navigate to firmware upgrade section
5. Upload and apply new firmware
6. Verify version after reboot
🔧 Temporary Workarounds
Network Segmentation
allIsolate router management interface to separate VLAN or restrict access to trusted devices only
Access Control Lists
allImplement firewall rules to restrict HTTP/HTTPS access to router management interface
🧯 If You Can't Patch
- Replace affected routers with different models that receive security updates
- Implement strict network segmentation to isolate router from untrusted devices
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is V2.3.1, device is vulnerable.Check Version:
Access router web interface at default IP (usually 192.168.1.1) and check System Status or Firmware Information pageVerify Fix Applied:
Verify firmware version has changed from V2.3.1 after applying any available updates📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to router management interface
- Multiple failed login attempts followed by successful POST requests
- Unexpected firmware or configuration changes
Network Indicators:
- HTTP POST requests to router IP on unusual ports
- Traffic patterns indicating command execution or data exfiltration from router
SIEM Query:
source_ip="router_ip" AND http_method="POST" AND (uri_contains="cgi-bin" OR uri_contains="admin")