SSH Public Key Vulnerability in FreePBX 17.x
CVE-2026-73664

8.6HIGH

Key Information:

Vendor

Freepbx

Status
Backup
Vendor
CVE Published:
13 August 2026

What is CVE-2026-73664?

The publicKeySave AJAX endpoint in FreePBX versions 17.0.5.34 to 17.0.10 allows an authenticated administrator to append SSH public keys directly to the Asterisk system user's authorized_keys file without rigorous enforcement of backup-only command restrictions. This can potentially grant unauthorized persistent shell access, enabling adversaries to execute arbitrary commands, access sensitive FreePBX data, modify crucial system files, and disrupt service operations. The issue has been rectified in version 17.0.11.

Affected Version(s)

backup >= 17.0.5.34, < 17.0.11

References

https://github.com/FreePBX/security-reporting/security/ad...
x_refsource_CONFIRM

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.