CVE-2026-1411
📋 TL;DR
This vulnerability in Beetel 777VR1 routers allows attackers with physical access to bypass access controls via the UART interface, potentially gaining unauthorized access to the device. The exploit requires physical device access and technical expertise, affecting users of these specific router models.
💻 Affected Systems
- Beetel 777VR1
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of router functionality, unauthorized access to network traffic, credential theft, and persistent backdoor installation.
Likely Case
Limited unauthorized access to router configuration or logs by attackers with physical access and technical skills.
If Mitigated
No impact if physical access controls prevent unauthorized personnel from accessing router hardware.
🎯 Exploit Status
Exploit requires physical device disassembly, UART hardware connection, and technical knowledge of serial communication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Vendor did not respond to disclosure.
🔧 Temporary Workarounds
Physical Security Enhancement
allSecure router in locked cabinet or restricted access area to prevent physical tampering.
UART Interface Disable
allIf firmware allows, disable UART debugging interface through configuration.
🧯 If You Can't Patch
- Implement strict physical access controls to router locations
- Monitor for unauthorized physical access attempts and tampering
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface or serial console. Vulnerable if version is 01.00.09 or earlier.Check Version:
Check web admin interface or use serial console to query firmware versionVerify Fix Applied:
No fix available to verify. Physical security controls should be implemented instead.📡 Detection & Monitoring
Log Indicators:
- Unexpected serial console access logs
- Firmware modification timestamps
Network Indicators:
- Unusual configuration changes
- Unexpected administrative access
SIEM Query:
Search for physical access logs, configuration change events, or unauthorized admin logins