CVE-2026-24437
📋 TL;DR
This vulnerability allows browsers to cache sensitive administrative pages from Tenda W30E V2 routers, potentially storing credentials locally. Attackers with physical or remote access to the browser cache could retrieve these credentials. This affects all users of Tenda W30E V2 routers with vulnerable firmware.
💻 Affected Systems
- Tenda W30E V2
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative credentials from browser cache, enabling full router compromise, network traffic interception, and lateral movement to connected devices.
Likely Case
Local attackers or malware on a user's device extracts cached credentials, allowing router configuration changes or network monitoring.
If Mitigated
With proper browser security settings and network segmentation, impact is limited to credential exposure on the specific compromised device.
🎯 Exploit Status
Exploitation requires access to browser cache where credentials are stored. No authentication bypass needed if credentials are already cached.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check Tenda website for firmware updates
2. Download latest firmware for W30E V2
3. Log into router admin interface
4. Navigate to System Tools > Firmware Upgrade
5. Upload and install new firmware
6. Clear browser cache after update
🔧 Temporary Workarounds
Browser Cache Control
allConfigure browsers to not cache sensitive pages or clear cache after router admin sessions
Use Private Browsing
allAccess router admin interface only in private/incognito browser modes
🧯 If You Can't Patch
- Disable remote administration and restrict admin interface to wired connections only
- Implement network segmentation to isolate router management traffic
🔍 How to Verify
Check if Vulnerable:
Check browser cache after accessing router admin interface for cached authentication pagesCheck Version:
Log into router admin interface and check System Status or About pageVerify Fix Applied:
Verify firmware version is newer than V16.01.0.19(5037) and check HTTP headers for proper cache-control directives📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful login from same IP
- Admin interface access from unusual locations
Network Indicators:
- Unauthorized configuration changes
- Unusual admin interface access patterns
SIEM Query:
source="router_logs" AND (event="admin_login" OR event="config_change") | stats count by src_ip, user