CVE-2025-64093
📋 TL;DR
This is a critical remote code execution vulnerability in Zenitel devices that allows unauthenticated attackers to execute arbitrary commands by injecting malicious input into the hostname field. Attackers can gain complete control of affected devices without any authentication. Organizations using vulnerable Zenitel products are at immediate risk.
💻 Affected Systems
- Zenitel devices (specific models not detailed in provided reference)
⚠️ 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 compromise of affected devices leading to lateral movement, data exfiltration, ransomware deployment, or integration into botnets.
Likely Case
Attackers gain shell access to vulnerable devices, install persistence mechanisms, and use them as footholds for further network attacks.
If Mitigated
Limited impact with proper network segmentation and access controls, though device compromise still occurs.
🎯 Exploit Status
CVSS 10.0 indicates trivial exploitation with no authentication required. Weaponization is likely given the critical nature and ease of exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided reference
Vendor Advisory: https://www.zenitel.com/sites/default/files/2025-12/A100K12333%20Zenitel%20Security%20Advisory.pdf
Restart Required: Yes
Instructions:
1. Download firmware update from Zenitel vendor portal. 2. Backup device configuration. 3. Apply firmware update following vendor instructions. 4. Verify update applied successfully. 5. Restart device.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Zenitel devices in separate VLANs with strict firewall rules limiting inbound/outbound traffic.
Access Control Lists
allImplement ACLs to restrict device management interface access to authorized IP addresses only.
🧯 If You Can't Patch
- Immediately disconnect vulnerable devices from networks or place behind strict firewall rules allowing only essential traffic
- Implement network monitoring and IDS/IPS rules to detect and block exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor advisory. Test if hostname field accepts special characters or command injection payloads.Check Version:
Check device web interface or CLI for firmware version information (vendor-specific command)Verify Fix Applied:
Verify firmware version matches patched version from vendor advisory. Test hostname field with injection payloads to confirm sanitization.📡 Detection & Monitoring
Log Indicators:
- Unusual hostname changes
- Command execution attempts in system logs
- Unexpected process creation
Network Indicators:
- Traffic to/from Zenitel devices containing shell metacharacters in hostname fields
- Unexpected outbound connections from devices
SIEM Query:
source="zenitel_device" AND (hostname CONTAINS "|" OR hostname CONTAINS ";" OR hostname CONTAINS "`" OR hostname CONTAINS "$")