CVE-2025-60693
📋 TL;DR
A stack-based buffer overflow vulnerability in Linksys E1200 v2 routers allows remote attackers to execute arbitrary code or cause denial of service without authentication. Attackers can exploit this by sending specially crafted HTTP requests that trigger improper bounds checking when concatenating CGI parameters. This affects all users of Linksys E1200 v2 routers running vulnerable firmware.
💻 Affected Systems
- Linksys E1200 v2
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with root privileges leading to complete device compromise, network infiltration, and persistent backdoor installation.
Likely Case
Denial of service causing router crashes and network disruption, potentially requiring physical reset.
If Mitigated
Limited impact if device is behind firewall with restricted HTTP access or if vulnerable service is disabled.
🎯 Exploit Status
Proof of concept code is available on GitHub. The vulnerability requires no authentication and has straightforward exploitation.
🛠️ 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. Wait for router to reboot.
🔧 Temporary Workarounds
Disable HTTP Management
allDisable HTTP access to router management interface and use HTTPS only
Access router admin interface -> Administration -> Management -> Disable HTTP access
Restrict Access with Firewall
linuxBlock external access to router's HTTP port (80) using network firewall
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Replace router with supported model
- Place router behind dedicated firewall with strict inbound rules
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under Status -> Router InformationCheck Version:
curl -s http://router-ip/status.cgi | grep FirmwareVerify Fix Applied:
Verify firmware version is newer than E1200_v2.0.11.001_us📡 Detection & Monitoring
Log Indicators:
- Multiple HTTP requests with CGI parameters containing _0~5 suffixes
- Router crash/reboot logs
- Unusual HTTP request patterns to router IP
Network Indicators:
- HTTP requests with unusually long parameter values
- Multiple rapid HTTP requests to router port 80
- Traffic patterns matching buffer overflow exploitation
SIEM Query:
source="router.log" AND (http_request CONTAINS "_0" OR "_1" OR "_2" OR "_3" OR "_4" OR "_5") AND http_request LENGTH > 100