# CVE-2026-54674: FreePBX command injection in User Control Panel

Source: https://junglewise.ai/threats/cve-2026-54674-freepbx-is-an-open-source-ip-pbx-prior-to-versions-16-0-39-and-17  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-28. Updated: 2026-09-28  
License: CC BY 4.0 with a link back

CVE-2026-54674 · Severity: info · Published 2026-09-28

FreePBX is an open-source IP telephone system used to manage voice communications in organizations. Authenticated users with access to the User Control Panel can execute arbitrary commands on the PBX server with webserver privileges, potentially compromising voice services and accessing sensitive data. The vulnerability requires legitimate user credentials but is particularly dangerous because many organizations grant standard employees UCP access while restricting higher-level administrator access.

Technologies: [FreePBX](https://junglewise.ai/threats/technologies/freepbx-freepbx). Vendors: [FreePBX](https://junglewise.ai/threats/vendors/freepbx).

## Quick answers

**Is CVE-2026-54674 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54674 being exploited in the wild.

**How severe is CVE-2026-54674?** Informational severity, published 28 September 2026.

**Which products and versions are affected?** FreePBX 16.0.0 through 16.0.38, 17.0.0 through 17.0.6.

**Is there a fix for CVE-2026-54674?** A patch was published on 2026-06-12. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-54674 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-54674?** Check whether you run FreePBX at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

Insufficient input sanitization in User Control Panel URL parameters allows authenticated users to inject and chain shell commands for arbitrary code execution as the webserver user (typically asterisk). The vulnerability stems from improper handling of malicious strings in URL parameters and requires only standard authenticated UCP access—no additional privileges or user interaction needed. Patches are available in FreePBX 16.0.39 and 17.0.7.

## Affected products

- FreePBX FreePBX 16.0.0 through 16.0.38, 17.0.0 through 17.0.6

## Timeline

- 2026-06-12: disclosed
- 2026-06-12: patched

## References

- [https://github.com/FreePBX/security-reporting/security/advisories/GHSA-4jjr-8g5r-wv66](https://github.com/FreePBX/security-reporting/security/advisories/GHSA-4jjr-8g5r-wv66)

## Related threats

- [FreePBX API command injection in documentation generator](https://junglewise.ai/threats/cve-2026-75600-freepbx-is-an-open-source-ip-pbx-prior-to-version-17-0-9)
- [FreePBX Superfecta arbitrary PHP code execution](https://junglewise.ai/threats/cve-2026-54710-freepbx-is-an-open-source-ip-pbx-prior-to-versions-16-0-40-and-17)
- [FreePBX backup module arbitrary code execution via path traversal](https://junglewise.ai/threats/cve-2026-54708-freepbx-is-an-open-source-ip-pbx-prior-to-versions-16-0-72-and-17)
- [FreePBX path traversal in soundlang file upload leading to RCE](https://junglewise.ai/threats/cve-2026-54675-freepbx-is-an-open-source-ip-pbx-prior-to-versions-16-0-10-and-17)
- [FreePBX Music on Hold module command injection](https://junglewise.ai/threats/cve-2026-45562-freepbx-is-an-open-source-ip-pbx-prior-to-versions-16-0-4-and-17)