CVE-2026-22082
📋 TL;DR
This vulnerability in Tenda wireless routers allows attackers to hijack administrative sessions by intercepting login credentials transmitted as session IDs. Attackers can compromise router configuration and potentially gain full control. Users of Tenda F3 and N300 routers with default configurations are affected.
💻 Affected Systems
- Tenda 300Mbps Wireless Router F3
- Tenda N300 Easy Setup Router
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attacker to change DNS settings, intercept all network traffic, install malware, or disable security features.
Likely Case
Session hijacking leading to unauthorized configuration changes, network disruption, or credential theft from connected devices.
If Mitigated
Limited impact if HTTPS is enforced and network segmentation prevents traffic interception.
🎯 Exploit Status
Exploitation requires intercepting network traffic (man-in-the-middle position) but uses simple credential capture. No authentication bypass needed once credentials are captured.
🛠️ 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 your model
3. Access router admin interface
4. Navigate to System Tools > Firmware Upgrade
5. Upload and apply new firmware
6. Verify update completed successfully
🔧 Temporary Workarounds
Enable HTTPS for Admin Interface
allForce HTTPS-only access to administrative interface to encrypt session IDs
Disable Remote Administration
allPrevent external access to router administrative interface
🧯 If You Can't Patch
- Segment router management to separate VLAN with strict access controls
- Implement network monitoring for unusual administrative access patterns
🔍 How to Verify
Check if Vulnerable:
Check if router transmits login credentials in URL parameters or unencrypted cookies during authentication. Use browser developer tools or packet capture to inspect authentication traffic.Check Version:
Login to router admin interface and check System Status or About page for firmware versionVerify Fix Applied:
Verify that session IDs are random tokens not derived from credentials and are transmitted only over HTTPS. Test authentication while monitoring network traffic.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful login from different IP
- Administrative configuration changes from unusual IP addresses
Network Indicators:
- Unencrypted HTTP traffic containing 'password', 'admin', or credential parameters
- Router administrative port (typically 80/8080) accessed from external IPs
SIEM Query:
source="router.logs" AND (event="admin_login" AND src_ip!=expected_admin_ip) OR (http_uri CONTAINS "password" OR http_uri CONTAINS "user")