# CVE-2026-73660: FreePBX: Authenticated TTS AGI Command Injection Through TTS Name

> An authenticated administrator can execute arbitrary OS commands via the TTS destination name in FreePBX, requiring an upgrade to fix.

- **Severity:** High 7.5 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Aug 2026
- **Updated:** 18 Aug 2026
- **Also known as:** GHSA-hg3v-m857-mvw9

## What is CVE-2026-73660?

CVE-2026-73660 is a high-severity command injection vulnerability in FreePBX tts, published on 13 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official 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.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-73660?


## How do I fix CVE-2026-73660?

No fix has been published for CVE-2026-73660 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-73660 being exploited?

There is no known exploitation of CVE-2026-73660 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-73660 and fix it if it is affected.

What it is: CVE-2026-73660 is a high-severity command injection vulnerability in FreePBX tts, published on 13 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-73660 in the wild and no public exploit code.

Affected product: FreePBX tts. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-73660/ (Markdown: https://insights.sbomify.com/CVE-2026-73660/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-73660
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-73660
- OSV: https://osv.dev/vulnerability/CVE-2026-73660

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-73660/
Summaries are generated and may contain mistakes; the official description above is the record.