CVE-2026-24428
📋 TL;DR
This vulnerability allows authenticated low-privileged users to change the administrator password on Tenda W30E V2 routers by exploiting an authorization flaw in the user management API. Attackers can bypass web interface restrictions and gain full administrative control. All users with firmware versions up to V16.01.0.19(5037) are affected.
💻 Affected Systems
- Tenda W30E V2
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attacker to reconfigure network settings, intercept traffic, install backdoors, and pivot to internal networks.
Likely Case
Attacker gains administrative access to router, changes settings, and potentially intercepts or redirects network traffic.
If Mitigated
Limited impact if proper network segmentation and monitoring are in place, though router control would still be lost.
🎯 Exploit Status
Exploitation requires authenticated access but the attack is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tendacn.com/product/W30E
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
Restrict User Account Access
allRemove or disable all non-administrative user accounts to prevent exploitation.
Network Segmentation
allIsolate router management interface to trusted networks only.
🧯 If You Can't Patch
- Monitor for unauthorized admin password changes and configuration modifications
- Implement strict access controls and limit user accounts to only essential personnel
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under System Status or About page.Check Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is newer than V16.01.0.19(5037) and test if low-privileged users can change admin password.📡 Detection & Monitoring
Log Indicators:
- Unusual admin password change events
- User privilege escalation attempts
- API calls to user management endpoints from non-admin accounts
Network Indicators:
- POST requests to user management API endpoints from unexpected sources
- Unusual authentication patterns
SIEM Query:
source="router_logs" AND (event="password_change" OR event="privilege_escalation") AND user!="admin"