CVE-2026-46376: FreePBX: Unauthenticated Use of Hard-Coded Credentials Vulnerability in FreePBX UCP Interface
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 Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
FreePBXto a version that resolves this vulnerability.Fixed in 16.0.45 - Upgrade
Upgrade
FreePBXto a version that resolves this vulnerability.Fixed in 17.0.7
Event History
Frequently Asked Questions
What is the severity of CVE-2026-46376?
CVE-2026-46376 has been rated with a critical severity score of 9.3.
What is CVE-2026-46376?
CVE-2026-46376 refers to an unauthenticated use of hard-coded credentials vulnerability in the FreePBX UCP interface.
How do I fix CVE-2026-46376?
To fix CVE-2026-46376, immediately change the hard-coded initial template credentials in FreePBX UCP to secure credentials.
Which versions are affected by CVE-2026-46376?
CVE-2026-46376 affects FreePBX versions from 15.0.42 to before 16.0.45 and 17.0.7.
Who is the vendor of the software affected by CVE-2026-46376?
The vendor of the affected software, FreePBX, is Sangoma.