CVE-2025-60699
📋 TL;DR
This CVE describes a buffer overflow vulnerability in TOTOLINK A950RG router firmware that allows unauthenticated remote attackers to execute arbitrary code. Attackers can exploit it by sending specially crafted HTTP requests to the router's web interface. All users of affected router firmware versions are vulnerable.
💻 Affected Systems
- TOTOLINK A950RG Router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attacker to install persistent malware, intercept all network traffic, pivot to internal networks, and potentially brick the device.
Likely Case
Router takeover leading to DNS hijacking, credential theft from network traffic, and creation of botnet node for DDoS attacks.
If Mitigated
Limited impact if router is behind firewall with restricted web interface access, though still vulnerable to internal threats.
🎯 Exploit Status
Public GitHub repositories contain detailed analysis and likely exploit code. The vulnerability requires only HTTP requests to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.totolink.net/
Restart Required: Yes
Instructions:
1. Check vendor website for firmware updates 2. Download latest firmware 3. Access router admin interface 4. Navigate to firmware upgrade section 5. Upload and apply new firmware 6. Reboot router
🔧 Temporary Workarounds
Disable Web Interface Remote Access
allDisable remote administration/WAN access to router web interface
Network Segmentation
allPlace router on isolated management network segment
🧯 If You Can't Patch
- Replace router with different model/brand
- Implement strict firewall rules blocking all external access to router web interface (ports 80/443)
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is V5.9c.4592_B20191022_ALL, device is vulnerable.Check Version:
Login to router web interface and check System Status or Firmware Information pageVerify Fix Applied:
Verify firmware version has been updated to a version newer than V5.9c.4592_B20191022_ALL.📡 Detection & Monitoring
Log Indicators:
- Unusually long HTTP requests to router web interface
- Multiple failed login attempts followed by buffer overflow patterns
Network Indicators:
- HTTP POST requests with abnormally long http_host parameters
- Traffic to router web interface from unexpected external IPs
SIEM Query:
source="router_logs" AND (uri="*http_host=*" AND length(uri)>1000) OR (event_type="buffer_overflow" AND device_type="router")