CVE-2026-28209: Sangoma FreePBX

High severity, CVSS 7.2. EPSS: 1.5% chance of exploitation in the next 30 days.

FreePBX is an open source IP PBX. From versions 16.0.17.2 to before 16.0.20 and from version 17.0.2.4 to before 17.0.5, a command injection vulnerability exists in FreePBX when using the ElevenLabs Text-to-Speech (TTS) engine in the recordings module. This issue has been patched in versions 16.0.20 and 17.0.5.

Affected products

• Sangoma FreePBX: from 16.0.17.2, before 16.0.20 (fixed in 16.0.20); from 17.0.2.4, before 17.0.5 (fixed in 17.0.5)

Published 2026-03-05. Last modified 2026-06-17.