CVE-2026-73664
HighCVSS 8.6Exploitation Probability (EPSS)
Low risk48th percentile - higher than 48% of all known CVEs
Summary
FreePBX from version 17.0.5.34 to 17.0.11 has a vulnerability in the publicKeySave AJAX endpoint in Backup.class.php, which accepts an administrator's SSH key and appends it to authorized_keys without reliably enforcing restrictions. The key grants persistent shell access with the ability to execute arbitrary commands, access FreePBX and call data, modify system files, and disrupt services.
Risk Assessment
Risk of persistent unauthorized access to the system as the asterisk user, potentially leading to full system compromise.
Recommendation
Update FreePBX to version 17.0.11 or later, which includes the fix.
Original NVD description (English source)
FreePBX is an open source IP PBX. From 17.0.5.34 until 17.0.11, the publicKeySave AJAX endpoint in Backup.class.php accepts an authenticated administrator's SSH public key and appends it to /home/asterisk/.ssh/authorized_keys for the asterisk system user without reliably enforcing backup-only command and source restrictions. The key grants persistent shell access that can execute arbitrary commands, access FreePBX and call data, modify system files, and disrupt services. This issue is fixed in version 17.0.11.