CVE-2025-46273
📋 TL;DR
CVE-2025-46273 is a critical vulnerability in UNI-NMS-Lite network management software where hard-coded administrative credentials allow unauthenticated attackers to gain full control over all managed devices. This affects all organizations using vulnerable versions of UNI-NMS-Lite for network device management. Attackers can compromise the entire network infrastructure through this single point of failure.
💻 Affected Systems
- UNI-NMS-Lite
⚠️ 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 network takeover: attacker gains administrative access to all managed routers, switches, firewalls, and other network devices, enabling data theft, service disruption, lateral movement, and persistent backdoor installation.
Likely Case
Attacker gains administrative privileges to UNI-NMS-Lite and all managed devices, allowing configuration changes, credential harvesting, network reconnaissance, and potential ransomware deployment.
If Mitigated
Limited impact if UNI-NMS-Lite is isolated in a management VLAN with strict network segmentation, but still poses significant risk to managed devices.
🎯 Exploit Status
Exploitation requires only network access to the UNI-NMS-Lite interface and knowledge of the hard-coded credentials. No authentication or special tools needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.5.1
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-25-114-06
Restart Required: Yes
Instructions:
1. Download UNI-NMS-Lite version 2.5.1 from vendor portal. 2. Backup current configuration. 3. Stop UNI-NMS-Lite service. 4. Install the update. 5. Restart service. 6. Verify new credentials are required for login.
🔧 Temporary Workarounds
Network Isolation
allPlace UNI-NMS-Lite in a dedicated management VLAN with strict firewall rules limiting access to authorized administrative IPs only.
Access Control List
linuxImplement network ACLs to restrict access to UNI-NMS-Lite web interface and API endpoints.
# Example iptables rule: iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
# Deny all other access: iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Immediately isolate UNI-NMS-Lite from all non-management networks using firewall rules
- Implement multi-factor authentication at network perimeter and monitor for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Attempt to login to UNI-NMS-Lite web interface using default credentials (check vendor advisory for specifics). If login succeeds without custom credentials, system is vulnerable.Check Version:
curl -k https://<nms-ip>/api/version 2>/dev/null | grep versionVerify Fix Applied:
After patching, verify that default credentials no longer work and custom authentication is required. Check version is 2.5.1 or higher.📡 Detection & Monitoring
Log Indicators:
- Successful authentication with default/admin credentials
- Multiple failed login attempts followed by success
- Configuration changes from unexpected IP addresses
Network Indicators:
- Unusual outbound connections from UNI-NMS-Lite to external IPs
- SSH/Telnet connections from UNI-NMS-Lite to managed devices at unusual times
SIEM Query:
source="UNI-NMS-Lite" AND (event_type="authentication_success" AND user="admin") OR (event_type="configuration_change" AND source_ip!="trusted_admin_ip")