CVE-2026-1409
📋 TL;DR
This vulnerability in Beetel 777VR1 routers allows attackers to bypass authentication rate limiting via the UART interface, potentially gaining unauthorized access. It affects physical devices running firmware versions up to 01.00.09/01.00.09_55. Attackers need physical access and technical expertise to exploit this.
💻 Affected Systems
- Beetel 777VR1
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Physical attacker gains administrative access to router, modifies configuration, intercepts traffic, or installs persistent malware.
Likely Case
Limited impact due to required physical access and high technical complexity; potential unauthorized configuration changes if exploited.
If Mitigated
Minimal impact with proper physical security controls preventing unauthorized device access.
🎯 Exploit Status
Exploit requires physical device access, UART interface knowledge, and technical skill; exploit details publicly disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available - vendor did not respond to disclosure
Restart Required: No
Instructions:
No official patch available. Consider replacing affected devices or implementing physical security controls.
🔧 Temporary Workarounds
Physical Security Hardening
allSecure physical access to routers to prevent unauthorized UART interface manipulation
Disable/Protect UART Interface
allPhysically disable or protect UART interface pins on device hardware if possible
🧯 If You Can't Patch
- Implement strict physical access controls to router locations
- Monitor for unauthorized physical access attempts and configuration changes
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface or serial console; versions up to 01.00.09/01.00.09_55 are vulnerableCheck Version:
Check via router web interface or serial console connectionVerify Fix Applied:
No fix available to verify; monitor for vendor firmware updates📡 Detection & Monitoring
Log Indicators:
- Unexpected configuration changes
- Multiple failed authentication attempts from physical console
Network Indicators:
- Unusual network configuration changes
- Unexpected administrative access patterns
SIEM Query:
Search for router configuration changes without authorized change tickets or authentication events from physical interfaces