CVE-2025-29226
📋 TL;DR
This CVE describes a command injection vulnerability in Linksys E5600 routers where an attacker can execute arbitrary commands via the pt["count"] parameter in the runtime.pingTest function. This affects Linksys E5600 V1.1.0.26 routers, potentially allowing remote code execution on the device.
💻 Affected Systems
- Linksys E5600
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full compromise of the router allowing attacker to intercept traffic, modify configurations, install persistent backdoors, or pivot to internal network devices.
Likely Case
Router compromise leading to network disruption, credential theft from connected devices, or installation of malware.
If Mitigated
Limited impact if router is behind firewall with restricted access and proper network segmentation.
🎯 Exploit Status
Public GitHub repository contains proof-of-concept demonstrating exploitation. Command injection vulnerabilities are frequently weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Linksys support for firmware updates. 2. If update available, download from official Linksys site. 3. Log into router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict access to router administration interface to trusted IP addresses only.
Disable Unnecessary Services
allDisable ping test functionality if not required for operations.
🧯 If You Can't Patch
- Isolate router in separate network segment with strict firewall rules
- Implement network monitoring for unusual outbound connections from router
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is V1.1.0.26, device is vulnerable.Check Version:
Check via router web interface: Login > Administration > Firmware UpgradeVerify Fix Applied:
Verify firmware version has been updated to a version later than V1.1.0.26.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple ping requests with abnormal parameters
- Unauthorized configuration changes
Network Indicators:
- Unexpected outbound connections from router
- Unusual traffic patterns to/from router management interface
SIEM Query:
source="router.log" AND ("pingTest" OR "runtime.lua") AND (command="*" OR shell="*")