FreePBX prior 16.0.6/17.0.5.4 Text-To-Speech module agi-bin/propolys-tts.agi os command injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.5$0-$5k3.46

Summaryinfo

A vulnerability was found in FreePBX and classified as problematic. This impacts an unknown function of the file agi-bin/propolys-tts.agi of the component Text-To-Speech module. The manipulation results in os command injection. This vulnerability is cataloged as CVE-2026-73660. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in FreePBX. It has been classified as problematic. Affected is an unknown code of the file agi-bin/propolys-tts.agi of the component Text-To-Speech module. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-73660 since 08/13/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Additional levels of successful authentication are needed for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

Upgrading to version 16.0.6 or 17.0.5.4 eliminates this vulnerability.

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Productinfo

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FreePBX 16.0.6/17.0.5.4

Timelineinfo

08/13/2026 Advisory disclosed
08/13/2026 +0 days CVE reserved
08/13/2026 +0 days VulDB entry created
08/13/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-73660 (🔒)
GCVE (CVE): GCVE-0-2026-73660
GCVE (VulDB): GCVE-100-389904

Entryinfo

Created: 08/13/2026 23:54
Changes: 08/13/2026 23:54 (54)
Complete: 🔍
Cache ID: 216::103

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