CVE-2025-50613
📋 TL;DR
A buffer overflow vulnerability in Netis WF2880 routers allows attackers to crash the device by sending specially crafted payloads to the cgitest.cgi endpoint. This affects Netis WF2880 v2.1.40207 routers, potentially causing denial of service. Organizations using these routers are vulnerable to service disruption.
💻 Affected Systems
- Netis WF2880
📦 What is this software?
Wf2880 Firmware by Netis Systems
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash requiring physical reboot, potential remote code execution if buffer overflow can be controlled precisely (though not confirmed in description).
Likely Case
Denial of service causing router reboot and network disruption for connected devices.
If Mitigated
Limited impact if device is behind firewall with restricted access to management interface.
🎯 Exploit Status
GitHub repository shows proof-of-concept exploit code. Attack appears to require sending crafted HTTP requests to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Check Netis website for firmware updates
2. Download latest firmware for WF2880
3. Access router admin interface
4. Navigate to firmware upgrade section
5. Upload and apply new firmware
6. Reboot router after update
🔧 Temporary Workarounds
Disable web management interface
allDisable the router's web management interface if not needed for administration
Restrict access to management interface
allConfigure firewall rules to restrict access to router management interface to trusted IPs only
🧯 If You Can't Patch
- Isolate vulnerable routers in separate network segment
- Implement network monitoring for unusual traffic to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is v2.1.40207, device is vulnerable.Check Version:
Check router web interface or use: curl -s http://router-ip/ | grep -i versionVerify Fix Applied:
Verify firmware version has been updated to a version newer than v2.1.40207📡 Detection & Monitoring
Log Indicators:
- Multiple requests to cgitest.cgi endpoint
- Router reboot logs
- Unusual payloads in HTTP requests
Network Indicators:
- HTTP POST requests to /cgitest.cgi with unusual wds_key_wep parameter
- Sudden loss of connectivity to router
SIEM Query:
source="router_logs" AND (uri="/cgitest.cgi" OR message="reboot" OR message="crash")