CVE-2025-60687
📋 TL;DR
An unauthenticated command injection vulnerability in ToToLink LR1200GB routers allows attackers to execute arbitrary system commands by sending malicious IMEI parameters in web requests. This affects all users of the vulnerable router firmware who have the web interface accessible. Attackers can gain complete control of the router without any authentication.
💻 Affected Systems
- ToToLink LR1200GB Router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise leading to network infiltration, credential theft, man-in-the-middle attacks, and persistent backdoor installation.
Likely Case
Router takeover for botnet recruitment, DNS hijacking, or credential harvesting from connected devices.
If Mitigated
Limited impact if router is behind firewall with no external web interface access.
🎯 Exploit Status
Public proof-of-concept exists on GitHub. Exploitation requires only a crafted HTTP request with malicious IMEI parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check ToToLink 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 Remote Management
allPrevent external access to router web interface
Access router admin panel → Advanced Settings → Remote Management → Disable
Network Segmentation
allIsolate router management interface from untrusted networks
Configure firewall rules to block external access to router IP on ports 80/443
🧯 If You Can't Patch
- Replace affected routers with different models that receive security updates
- Implement strict network monitoring and intrusion detection for suspicious router traffic
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface or attempt exploitation with test payload (caution: may trigger detection).Check Version:
curl -s http://router-ip/ | grep -i firmware or check router admin interfaceVerify Fix Applied:
Verify firmware version is newer than V9.1.0u.6619_B20230130 and test exploitation fails.📡 Detection & Monitoring
Log Indicators:
- Unusual IMEI parameter values in web logs
- System command execution from web process
- Multiple failed authentication attempts followed by successful command execution
Network Indicators:
- HTTP requests to cstecgi.cgi with IMEI parameter containing shell metacharacters
- Outbound connections from router to suspicious IPs
SIEM Query:
source="router_logs" AND (uri="*cstecgi.cgi*" AND param="*imei=*" AND (param="*;*" OR param="*|*" OR param="*`*" OR param="*$(*"))