Vulnerability · Published Aug 13, 2026 · Assigned by GitHub_M

CVE-2026-73664FreePBX: Authenticated Arbitrary SSH Key Injection via Backup Module

High 8.6

In plain English

A high-severity privilege mismanagement in backup from FreePBX. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 4.0)8.6High

Exploit odds (30 days)0.5%top 56.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
FreePBX	backup	>= 17.0.5.34, < 17.0.11

Weakness: CWE-269, CWE-284, CWE-732 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

https://github.com/FreePBX/security-reporting/security/advisories/GHSA-24w6-hpg3-rwfg x_refsource_CONFIRM