CVE-2025-15076
📋 TL;DR
This vulnerability allows remote attackers to bypass authentication and perform path traversal attacks on Tenda CH22 routers. Attackers can access restricted files and directories without proper credentials. Users of Tenda CH22 routers with firmware version 1.0.0.1 are affected.
💻 Affected Systems
- Tenda CH22 Router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to access sensitive configuration files, modify router settings, and potentially gain persistent access to the network.
Likely Case
Unauthorized access to router configuration files, potential credential theft, and network reconnaissance.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external exploitation attempts.
🎯 Exploit Status
Public exploit code is available, making this easily exploitable by attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tenda.com.cn/
Restart Required: Yes
Instructions:
1. Check Tenda 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
Network Segmentation
allIsolate router management interface from untrusted networks
Access Control Lists
allRestrict access to router management interface to trusted IPs only
🧯 If You Can't Patch
- Replace affected routers with updated models or different vendors
- Implement strict network monitoring and intrusion detection for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is 1.0.0.1, the device is vulnerable.Check Version:
Access router web interface at http://[router-ip] and check System Status or Firmware Version pageVerify Fix Applied:
Verify firmware version has been updated to a version later than 1.0.0.1.📡 Detection & Monitoring
Log Indicators:
- Unusual access to /public/ directory
- Multiple failed authentication attempts followed by successful access
- Access to configuration files from unauthorized IPs
Network Indicators:
- HTTP requests to /public/ with traversal patterns (../)
- Unauthorized access to router management interface from external IPs
SIEM Query:
source="router_logs" AND (uri="/public/*" OR uri CONTAINS "../")