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CVE-2026-46376

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

Published: May 29, 2026Updated: Jun 1, 2026 Sources: CVE List NVD
NVD MITRE
9.8CVSS
CRITICAL

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.

EPSS Score
0.1%
Top 75.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

CWE-798

Affected Products

security-reporting
FreePBX
Communications / voip-telephony
freepbx
sangoma
Communications / voip-telephony
freepbxoss-projectCommunicationsaka freepbx, security-reporting, endpoint
sangomacommercialCACommunicationsaka freepbx, certified asterisk, asterisk

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Workaround Available

MITRE ATT&CK

2 techniques
Credential Access
Initial Access
View detailed technique mapping

References

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

Timeline

Published
May 29, 2026
Last Updated
Jun 1, 2026
News mentions
1

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