CVE-2026-73664: CWE-269: Improper Privilege Management in FreePBX backup
FreePBX backup versions prior to 17.0.11 contain a vulnerability in the publicKeySave AJAX endpoint that allows an authenticated administrator to append an SSH public key to the asterisk user's authorized_keys file without proper command restrictions. This grants persistent shell access with the ability to execute arbitrary commands, access sensitive data, modify system files, and disrupt services. The issue is fixed in version 17.0.11.
AI Analysis
Technical Summary
CVE-2026-73664 describes an improper privilege management vulnerability (CWE-269) in FreePBX backup component versions before 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 without reliably enforcing backup-only command and source restrictions. This flaw allows persistent shell access as the asterisk system user, enabling arbitrary command execution, access to FreePBX and call data, modification of system files, and potential service disruption. The vulnerability is resolved in FreePBX backup version 17.0.11.
Potential Impact
An attacker with authenticated administrator access can gain persistent shell access as the asterisk system user, allowing execution of arbitrary commands, unauthorized access to sensitive FreePBX and call data, modification of system files, and disruption of services. This elevates privileges beyond intended backup operations, posing a high security risk.
Mitigation Recommendations
This vulnerability is fixed in FreePBX backup version 17.0.11. Users should upgrade to version 17.0.11 or later to remediate this issue. No vendor advisory content contradicts this; therefore, upgrading is the recommended action.
CVE-2026-73664: CWE-269: Improper Privilege Management in FreePBX backup
Description
FreePBX backup versions prior to 17.0.11 contain a vulnerability in the publicKeySave AJAX endpoint that allows an authenticated administrator to append an SSH public key to the asterisk user's authorized_keys file without proper command restrictions. This grants persistent shell access with the ability to execute arbitrary commands, access sensitive data, modify system files, and disrupt services. The issue is fixed in version 17.0.11.
CVSS v4.0
Score 8.6high
Affected software
FreePBX
backup
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-73664 describes an improper privilege management vulnerability (CWE-269) in FreePBX backup component versions before 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 without reliably enforcing backup-only command and source restrictions. This flaw allows persistent shell access as the asterisk system user, enabling arbitrary command execution, access to FreePBX and call data, modification of system files, and potential service disruption. The vulnerability is resolved in FreePBX backup version 17.0.11.
Potential Impact
An attacker with authenticated administrator access can gain persistent shell access as the asterisk system user, allowing execution of arbitrary commands, unauthorized access to sensitive FreePBX and call data, modification of system files, and disruption of services. This elevates privileges beyond intended backup operations, posing a high security risk.
Mitigation Recommendations
This vulnerability is fixed in FreePBX backup version 17.0.11. Users should upgrade to version 17.0.11 or later to remediate this issue. No vendor advisory content contradicts this; therefore, upgrading is the recommended action.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-13T14:04:09.606Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a7e3d9bbf8831d539db73a9
Added to database: 08/13/2026, 21:56:43 UTC
Last enriched: 08/21/2026, 14:00:15 UTC
Last updated: 09/26/2026, 13:47:48 UTC
Views: 79
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.