CVE-2026-73660Network attack vectorHinoki check available

Authenticated command execution via unescaped TTS filenames

Published Aug 13, 2026 · Updated Aug 13, 2026

OS command injection in FreePBX Text To Speech before 16.0.6 and 17.0.5.4 allows remote authenticated users to execute host commands. The destination name is decoded into an AGI argument and reused in unquoted filenames passed to exec() in agi-bin/propolys-tts.agi. An existing FreePBX administrator account is required, and commands run with the privileges of the asterisk service user.

CVSS severity7.5
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OS command injection in FreePBX Text To Speech before 16.0.6 and 17.0.5.4 allows remote authenticated users to execute host commands. The destination name is decoded into an AGI argument and reused in unquoted filenames passed to exec() in agi-bin/propolys-tts.agi. An existing FreePBX administrator account is required, and commands run with the privileges of the asterisk service user.

The record

CVE
CVE-2026-73660
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
FreePBX
Product
Text To Speech
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 16.0.6
  2. Affected versionversion=>= 17.0.1, < 17.0.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

FreePBX · Text To Speechversion=< 16.0.6; version=>= 17.0.1, < 17.0.5.4

Published CVSS scores

7.5FreePBXCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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