CVE-2022-46080
📋 TL;DR
This vulnerability in Nexxt Nebula 1200-AC routers allows attackers to bypass authentication and execute arbitrary commands by exploiting the HTTPD service to enable TELNET access. It affects organizations using these specific routers with vulnerable firmware. The high CVSS score reflects the severe impact potential.
💻 Affected Systems
- Nexxt Nebula 1200-AC
📦 What is this software?
Nebula1200 Ac Firmware by Nexxtsolutions
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router leading to network infiltration, data interception, lateral movement to internal systems, and persistent backdoor installation.
Likely Case
Unauthorized access to router configuration, network traffic monitoring, credential theft, and potential denial of service.
If Mitigated
Limited impact if network segmentation isolates the router and external access is restricted, though local network compromise remains possible.
🎯 Exploit Status
Exploit code is publicly available on GitHub, making this easily weaponizable by attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://nexxtsolutions.com
Restart Required: No
Instructions:
Check vendor website for firmware updates; if unavailable, consider workarounds or replacement.
🔧 Temporary Workarounds
Disable HTTPD service
allTurn off the vulnerable HTTPD service to prevent exploitation.
Access router admin interface → Services → Disable HTTPD
Block TELNET ports
linuxUse firewall rules to block TELNET ports (typically 23) from unauthorized access.
iptables -A INPUT -p tcp --dport 23 -j DROP
🧯 If You Can't Patch
- Isolate the router on a dedicated VLAN with strict access controls.
- Implement network monitoring for unusual TELNET or HTTPD activity.
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface; if version is 15.03.06.60, it is vulnerable.Check Version:
Login to router admin interface and navigate to System Information.Verify Fix Applied:
Verify firmware has been updated to a patched version or HTTPD service is disabled.📡 Detection & Monitoring
Log Indicators:
- Unexpected TELNET service activation
- Unauthorized HTTPD requests
- Failed authentication attempts followed by successful access
Network Indicators:
- Unusual traffic on port 23 (TELNET)
- HTTP requests to router management interface from untrusted sources
SIEM Query:
source="router_logs" AND (event="TELNET enabled" OR event="HTTPD exploit")