CVE-2026-46376
FreePBX: Unauthenticated Use of Hard-Coded Credentials Vulnerability in FreePBX UCP Interface
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.
INFO
Published Date :
May 29, 2026, 2:16 p.m.
Last Modified :
July 21, 2026, 12:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update FreePBX to version 16.0.45 or later.
- Update FreePBX to version 17.0.7 or later.
- Change default UCP credentials.
Public PoC/Exploit Available at Github
CVE-2026-46376 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-46376.
| URL | Resource |
|---|---|
| https://github.com/FreePBX/security-reporting/security/advisories/GHSA-m55x-h47x-v3gx | Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-46376 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-46376
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-46376 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-46376 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Added Translation Title: security-reporting de FreePBX, Description: FreePBX es una PBX IP de código abierto. Desde 15.0.42 hasta antes de 16.0.45 y 17.0.7, los usuarios no autenticados podrían acceder al Panel de Control de Usuario (UCP) utilizando credenciales de plantilla iniciales codificadas si estas no fueron cambiadas inmediatamente por el Administrador que habilitó el UCP. Se requiere acceso autenticado a ACP para la configuración inicial de las plantillas genéricas del UCP, pero después de eso, sin pasos adicionales por parte del administrador, los usuarios no autenticados podrían obtener acceso. Esta vulnerabilidad está corregida en 16.0.45 y 17.0.7. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'FreePBX', 'product': 'security-reporting', 'versions': [{'status': 'affected', 'version': '>= 15.0.42, < 16.0.45'}, {'status': 'affected', 'version': '>= 17.0.1, < 17.0.7'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-46376', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-05-29T13:59:51.362788Z'} -
Initial Analysis by [email protected]
Jun. 01, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:sangoma:freepbx:*:*:*:*:*:*:*:* versions from (including) 17.0 up to (excluding) 17.0.7 *cpe:2.3:a:sangoma:freepbx:*:*:*:*:*:*:*:* versions up to (excluding) 16.0.45 Added Reference Type GitHub, Inc.: https://github.com/FreePBX/security-reporting/security/advisories/GHSA-m55x-h47x-v3gx Types: Mitigation, Vendor Advisory -
New CVE Received by [email protected]
May. 29, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-798 Added Reference https://github.com/FreePBX/security-reporting/security/advisories/GHSA-m55x-h47x-v3gx