CVE-2026-73660 FreePBX: Authenticated TTS AGI Command Injection Through TTS Name
An authenticated administrator can execute arbitrary OS commands via the TTS destination name in FreePBX, requiring an upgrade to fix.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73660?
CVE-2026-73660 is a high-severity command injection vulnerability in FreePBX tts, published on 13 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
FreePBX is an open source IP PBX. Prior to 16.0.6 and 17.0.5.4, the FreePBX Text-To-Speech module allows an authenticated administrator to save a TTS destination name that is HTML-encoded for storage, decoded during dialplan generation, passed as an AGI argument, and used to build filenames inside agi-bin/propolys-tts.agi. The TTS destination name reaches a raw shell-command execution path, allowing arbitrary operating-system command execution as the asterisk service user. This issue is fixed in versions 16.0.6 and 17.0.5.4.
Weakness: CWE-78
Which versions are affected by CVE-2026-73660?
How do I fix CVE-2026-73660?
No fix has been published for CVE-2026-73660 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-73660 being exploited?
There is no known exploitation of CVE-2026-73660 in the wild and no public exploit code.
Sources
Also known as GHSA-hg3v-m857-mvw9.