FreePBX: Authenticated TTS AGI Command Injection Through TTS Name (CVE-2026-73660) | HOL Guard CVE

High · CVSS 7.5CVE-2026-73660

FreePBX: Authenticated TTS AGI Command Injection Through TTS Name

Answer in brief

CVE-2026-73660 records a High severity (CVSS 7.5) vulnerability in FreePBX: Authenticated TTS AGI Command Injection Through TTS Name. The current sources do not mark it as known exploited. The current feed maps FreePBX/tts (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 13, 2026Updated Sep 18, 2026Source checked Sep 28, 2026First seen by HOL Aug 13, 2026Material review Sep 18, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps FreePBX/tts (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
FreePBX/ttsgeneric	<16.0.6 \|\| >=17.0.1 <17.0.5.4	16.0.6, 17.0.5.4

Recommended response

Check inventory. Check lockfiles and deployed manifests for FreePBX/tts.
Review the reported fix. Update FreePBX/tts to 16.0.6 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 13, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.