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TI-2026-51744 Aliases CVE-2026-73660

FreePBX: Authenticated TTS AGI Command Injection Through TTS Name

Priority LOW 36CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00771 55th percentileScored 2026-11-07
Fix Fixed tts (FreePBX): 16.0.6, 17.0.5.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
FreePBXttsbefore 16.0.6; 17.0.1 to before 17.0.5.416.0.6, 17.0.5.4Patch availableCNA
  • tts VendorFreePBX Affected before 16.0.6; 17.0.1 to before 17.0.5.4 Fixed in 16.0.6, 17.0.5.4 Patch available CNA

Remediation

  • Fix · CNA tts (FreePBX) Fixed in 16.0.6, 17.0.5.4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-73660

References

Other 3

  • TI-2025-35702 FreePBX Affected by Authentication Bypass Leading to SQL Injection and RCE KEVCVSS 4.0CRITICAL 10.0
  • TI-2025-39763 FreePBX Administration GUI is Vulnerable to Authenticated Command Injection KEVCVSS 4.0HIGH 8.6
  • TI-2024-38391 FreePBX 16 Authenticated Remote Code Execution via API Module CVSS 4.0HIGH 8.7
  • TI-2014-06023 htdocs_ari/includes/login.php in the ARI Framework module/Asterisk Recording Interface… CVSS 2.0HIGH 10.0
  • TI-2025-36981 FreePBX core module vulnerable to reflected cross-site scripting via Asterisk HTTP Status page CVSS 4.0HIGH 8.5
  • TI-2025-38110 FreePBX Endpoint Manager vulnerable to authenticated arbitrary file upload via fwbrand parameter CVSS 4.0HIGH 8.6
See all 55 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences