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CVE-2026-46376

Sangoma Freepbx hard-coded credentials

9.8 CRITICALEPSS 0.50%
  1. Published29 May 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Sangoma Freepbx≥ 17.0 < 17.0.7 · < 16.0.45

Remediation

Fixed in
Sangoma Freepbx≥ 17.0.7

References

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Frequently asked

Is CVE-2026-46376 being actively exploited?

CVE-2026-46376 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.50%.

How severe is CVE-2026-46376?

CVE-2026-46376 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.50% probability of exploitation.

Which products are affected by CVE-2026-46376?

Affected products include Sangoma Freepbx.

How do I fix CVE-2026-46376?

Upgrade affected software to a fixed version, for example Sangoma Freepbx 17.0.7 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-46376 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.