What’s Vulnerable › Vulnerabilities
CVE-2026-46376: FreePBX: Unauthenticated Use of Hard-Coded Credentials Vulnerability in FreePBX UCP Interface
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-29 · updated 2026-07-21
- Weakness: CWE-798
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.
Affected products
- Sangoma FreePBX: before 16.0.45; from 17.0 before 17.0.7 — fixed in 16.0.45, 17.0.7
How to fix
Upgrade to a fixed version: Sangoma FreePBX 16.0.45, 17.0.7. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-46376 or the next vulnerability affects your stack