CVE-2026-27975
📋 TL;DR
CVE-2026-27975 is an unauthenticated remote code execution vulnerability in Ajenti server admin panel. Attackers can execute arbitrary code on servers running vulnerable versions without authentication. This affects all Ajenti installations prior to version 2.2.13.
💻 Affected Systems
- Ajenti
📦 What is this software?
Ajenti by Ajenti
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise allowing attackers to install malware, steal data, pivot to other systems, or establish persistent backdoors.
Likely Case
Attackers gain shell access to the server, install cryptocurrency miners, create unauthorized user accounts, or deploy ransomware.
If Mitigated
If properly segmented and monitored, impact limited to the Ajenti host with potential lateral movement prevented.
🎯 Exploit Status
Unauthenticated exploitation makes this particularly dangerous. While no public PoC exists, the advisory suggests straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2.13
Vendor Advisory: https://github.com/ajenti/ajenti/security/advisories/GHSA-vcw3-r3fx-j444
Restart Required: Yes
Instructions:
1. Backup current Ajenti configuration. 2. Stop Ajenti service. 3. Update Ajenti to version 2.2.13 using package manager or manual installation. 4. Restart Ajenti service. 5. Verify version is 2.2.13 or higher.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to Ajenti panel to trusted IP addresses only
iptables -A INPUT -p tcp --dport 8000 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 8000 -j DROP
Service Disablement
linuxTemporarily disable Ajenti service until patching can be completed
systemctl stop ajenti
systemctl disable ajenti
🧯 If You Can't Patch
- Isolate Ajenti server from internet and restrict internal network access
- Implement strict network monitoring and alerting for suspicious activity on Ajenti port
🔍 How to Verify
Check if Vulnerable:
Check Ajenti version via web interface or command line. If version is below 2.2.13, system is vulnerable.Check Version:
ajenti-panel --versionVerify Fix Applied:
Confirm Ajenti version is 2.2.13 or higher and test that unauthenticated access does not allow code execution.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access attempts to admin endpoints
- Unusual process execution from Ajenti user
- Failed authentication logs followed by successful access
Network Indicators:
- Unusual outbound connections from Ajenti server
- Traffic to Ajenti port from unexpected sources
SIEM Query:
source="ajenti.log" AND ("unauthenticated" OR "unauthorized") AND ("exec" OR "command" OR "shell")