CVE-2026-73660: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in FreePBX tts
CVE-2026-73660 is a high-severity OS command injection vulnerability in the FreePBX Text-To-Speech (TTS) module. It affects versions prior to 16.0.6 and 17.0.5.4. An authenticated administrator can exploit this flaw by saving a specially crafted TTS destination name that is improperly neutralized, leading to arbitrary command execution as the asterisk service user. This vulnerability is fixed in FreePBX versions 16.0.6 and 17.0.5.4.
AI Analysis
Technical Summary
The FreePBX TTS module prior to versions 16.0.6 and 17.0.5.4 improperly handles a TTS destination name input. This input is HTML-encoded for storage but later decoded during dialplan generation and passed as an AGI argument to build filenames inside agi-bin/propolys-tts.agi. The lack of proper neutralization allows the input to reach a raw shell command execution path, enabling an authenticated administrator to execute arbitrary operating system commands with the privileges of the asterisk service user. This vulnerability is identified as CWE-78 (Improper Neutralization of Special Elements used in an OS Command).
Potential Impact
Successful exploitation allows an authenticated administrator to execute arbitrary OS commands as the asterisk service user, potentially leading to unauthorized system control or disruption of telephony services. The impact is high due to the ability to execute commands on the underlying operating system with service-level privileges.
Mitigation Recommendations
This issue is fixed in FreePBX versions 16.0.6 and 17.0.5.4. Users should upgrade to these or later versions to remediate the vulnerability. No vendor advisory or patch link was provided, but the fix is confirmed by the version information in the description. Until upgraded, restrict administrative access to trusted users only.
CVE-2026-73660: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in FreePBX tts
Description
CVE-2026-73660 is a high-severity OS command injection vulnerability in the FreePBX Text-To-Speech (TTS) module. It affects versions prior to 16.0.6 and 17.0.5.4. An authenticated administrator can exploit this flaw by saving a specially crafted TTS destination name that is improperly neutralized, leading to arbitrary command execution as the asterisk service user. This vulnerability is fixed in FreePBX versions 16.0.6 and 17.0.5.4.
CVSS v4.0
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The FreePBX TTS module prior to versions 16.0.6 and 17.0.5.4 improperly handles a TTS destination name input. This input is HTML-encoded for storage but later decoded during dialplan generation and passed as an AGI argument to build filenames inside agi-bin/propolys-tts.agi. The lack of proper neutralization allows the input to reach a raw shell command execution path, enabling an authenticated administrator to execute arbitrary operating system commands with the privileges of the asterisk service user. This vulnerability is identified as CWE-78 (Improper Neutralization of Special Elements used in an OS Command).
Potential Impact
Successful exploitation allows an authenticated administrator to execute arbitrary OS commands as the asterisk service user, potentially leading to unauthorized system control or disruption of telephony services. The impact is high due to the ability to execute commands on the underlying operating system with service-level privileges.
Mitigation Recommendations
This issue is fixed in FreePBX versions 16.0.6 and 17.0.5.4. Users should upgrade to these or later versions to remediate the vulnerability. No vendor advisory or patch link was provided, but the fix is confirmed by the version information in the description. Until upgraded, restrict administrative access to trusted users only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-13T14:04:09.605Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7e3a17bf8831d539d7044b
Added to database: 08/13/2026, 21:41:43 UTC
Last enriched: 08/13/2026, 21:56:26 UTC
Last updated: 08/13/2026, 22:02:21 UTC
Views: 5
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