CVE-2025-60689
📋 TL;DR
An unauthenticated command injection vulnerability in Linksys E1200 v2 routers allows remote attackers to execute arbitrary commands on the device without authentication. This affects users running vulnerable firmware versions, potentially compromising router security and connected networks.
💻 Affected Systems
- Linksys E1200 v2
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to network compromise, data interception, malware deployment, and persistent backdoor installation.
Likely Case
Router configuration manipulation, DNS hijacking, credential theft, and use as attack platform against internal network.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
Exploit requires sending crafted HTTP requests with malicious CGI parameters to vulnerable endpoints
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.linksys.com/
Restart Required: Yes
Instructions:
1. Check Linksys website for firmware updates
2. Download latest firmware for E1200 v2
3. Access router admin interface
4. Navigate to firmware update section
5. Upload and apply new firmware
6. Reboot router
🔧 Temporary Workarounds
Disable Remote Administration
allPrevent external access to router administration interface
Network Segmentation
allPlace router in isolated network segment with restricted access
🧯 If You Can't Patch
- Replace router with supported model
- Implement strict firewall rules blocking all WAN access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface or via SSH if enabledCheck Version:
cat /proc/version or check web interfaceVerify Fix Applied:
Verify firmware version is newer than E1200_v2.0.11.001_us.tar.gz📡 Detection & Monitoring
Log Indicators:
- Unusual CGI parameter values in httpd logs
- Multiple failed authentication attempts to admin interface
- Suspicious command execution in system logs
Network Indicators:
- HTTP requests with unusual CGI parameters (wl_ant, wl_ssid, wl_rate, ttcp_num, ttcp_ip, ttcp_size) containing shell metacharacters
- Outbound connections from router to unexpected destinations
SIEM Query:
source="router_logs" AND ("wl_ant" OR "wl_ssid" OR "wl_rate" OR "ttcp_num" OR "ttcp_ip" OR "ttcp_size") AND ("|" OR ";" OR "&" OR "`" OR "$")