CVE-2026-46376

FreePBX: Unauthenticated Use of Hard-Coded Credentials Vulnerability in FreePBX UCP Interface

State: Published
Severity: 9.3 Critical
Published: May 29, 2026
Updated: Sep 28, 2026
Reserved: May 13, 2026

Description

FreePBX is an open source IP PBX. From 15.0.42 to before 16.0.45 and 17.0.7, unauthenticated users may be able to access the User Control Panel (UCP) using hard-coded initial template credentials if these were not immediately changed by the Administrator who enabled UCP. Authenticated access to ACP is required for the initial setup of UCP generic templates, but after that, without further steps by the admin, unauthenticated users may be able to gain access. This vulnerability is fixed in 16.0.45 and 17.0.7.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-798 Use of Hard-coded Credentials

Affected Products

Product	Versions
security-reportingFreePBX	>= 15.0.42, < 16.0.45Affected >= 17.0.1, < 17.0.7Affected

References

https://github.com/FreePBX/security-reporting/security/advisories/GHSA-m55x-h47x-v3gx

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