CVE-2026-24429
📋 TL;DR
This vulnerability allows attackers to use hardcoded default credentials to gain administrative access to Tenda W30E V2 routers. Anyone using affected firmware versions without changing default passwords is vulnerable. Attackers can fully control the router once authenticated.
💻 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, malware deployment, and persistent backdoor installation.
Likely Case
Unauthorized access to router settings, DNS hijacking, network monitoring, and credential theft from connected devices.
If Mitigated
Limited impact if default credentials were changed during initial setup or if router is behind firewall with restricted management interface access.
🎯 Exploit Status
Exploitation requires knowledge of the default credentials but is trivial once known. Attackers only need access to the management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
Check Tenda website for firmware updates. If available, download latest firmware, access router admin panel, navigate to System Tools > Firmware Upgrade, upload new firmware file, and wait for reboot.
🔧 Temporary Workarounds
Change Default Credentials
allImmediately change the default password for the built-in authentication account
Restrict Management Interface Access
allConfigure firewall rules to restrict access to router management interface to trusted IPs only
🧯 If You Can't Patch
- Change all default credentials immediately and enable strong authentication
- Isolate affected routers in separate network segments and monitor for suspicious access attempts
🔍 How to Verify
Check if Vulnerable:
Attempt to log into router management interface using default credentials. If successful, device is vulnerable.Check Version:
Log into router admin panel and check System Status or About page for firmware versionVerify Fix Applied:
Verify default credentials no longer work and only custom credentials provide access.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful login
- Login events from unexpected IP addresses
- Configuration changes from unauthorized users
Network Indicators:
- Unusual traffic patterns from router
- DNS configuration changes
- Port scans targeting router management ports (typically 80, 443, 8080)
SIEM Query:
source="router_logs" (event_type="login_success" AND user="default_admin") OR (event_type="config_change" AND NOT user="authorized_user")