CVE-2026-2618
📋 TL;DR
This vulnerability in Beetel 777VR1 routers allows attackers to exploit weak cryptographic algorithms in the SSH service, potentially enabling unauthorized access or data interception. It affects users running firmware versions up to 01.00.09. The vulnerability is remotely exploitable but requires high attack complexity.
💻 Affected Systems
- Beetel 777VR1 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of router with administrative access, allowing traffic interception, network pivoting, or device takeover.
Likely Case
Cryptographic downgrade attacks leading to SSH session compromise or credential theft.
If Mitigated
Limited impact due to high exploit complexity and proper network segmentation.
🎯 Exploit Status
Proof-of-concept available on GitHub; exploit requires cryptographic attack capabilities and SSH access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to newer firmware if released or replacing affected hardware.
🔧 Temporary Workarounds
Disable SSH Service
allTurn off SSH access if not required for management
Router-specific command to disable SSH (check device admin interface)
Restrict SSH Access
allLimit SSH connections to trusted IP addresses only
Configure firewall rules to restrict SSH port 22/tcp to management networks
🧯 If You Can't Patch
- Segment affected routers in isolated network zones
- Implement network monitoring for SSH brute force or cryptographic downgrade attempts
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface; if version is 01.00.09 or earlier, device is vulnerableCheck Version:
Check router web interface or use SSH command: 'show version' or similarVerify Fix Applied:
Verify firmware version is above 01.00.09 or SSH service is disabled/restricted📡 Detection & Monitoring
Log Indicators:
- Failed SSH authentication attempts
- SSH cryptographic algorithm negotiation errors
- Unusual SSH connection patterns
Network Indicators:
- SSH traffic to router from unexpected sources
- SSH version negotiation patterns indicating downgrade attempts
SIEM Query:
source="router_logs" AND (event="ssh_failed" OR event="ssh_negotiation")