CVE-2026-24440
📋 TL;DR
This vulnerability allows unauthorized password changes on Tenda W30E V2 routers without verifying the current password. Attackers who gain access to the maintenance interface can change administrative credentials, potentially taking full control of affected devices. All users of vulnerable firmware versions are affected.
💻 Affected Systems
- Shenzhen Tenda W30E V2 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing traffic interception, network pivoting, credential theft, and persistent backdoor installation.
Likely Case
Unauthorized administrative access leading to network configuration changes, DNS hijacking, and device takeover.
If Mitigated
Limited impact if maintenance interface is properly firewalled and access controls are enforced.
🎯 Exploit Status
Exploitation requires access to the maintenance interface but no authentication for password changes.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates
2. Download latest firmware for W30E V2
3. Access router admin interface
4. Navigate to firmware upgrade section
5. Upload and apply new firmware
6. Reboot router
🔧 Temporary Workarounds
Restrict maintenance interface access
linuxBlock access to the maintenance interface using firewall rules
iptables -A INPUT -p tcp --dport [maintenance-port] -j DROP
Disable remote management
allTurn off remote management features in router settings
🧯 If You Can't Patch
- Isolate affected routers in separate network segments
- Implement strict network access controls to limit who can reach maintenance interfaces
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under System Status or About pageCheck Version:
curl -s http://router-ip/status | grep firmwareVerify Fix Applied:
Verify firmware version is above V16.01.0.19(5037) and test password change requires current password📡 Detection & Monitoring
Log Indicators:
- Unusual password change events
- Multiple failed login attempts followed by password reset
- Access from unexpected IP addresses to maintenance interface
Network Indicators:
- HTTP POST requests to password change endpoints without authentication
- Traffic to router maintenance ports from unauthorized sources
SIEM Query:
source="router-logs" AND (event="password_change" OR event="admin_reset") AND NOT user="authenticated_admin"