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VulnerabilityPublished Updated

CVE-2026-46376: FreePBX security-reporting · Use of Hard-coded Credentials

Affects FreePBX security-reportingSource CVE Database V5

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Not known to be exploited · CVSS 9.3 Critical : upgrade to 17.0.7 or 16.0.45 as a priority.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score
9.3Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 17.0.7, 16.0.45
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade FreePBX security-reporting to 17.0.7 or 16.0.45.

Affected software

ProductAffectedFixed in
FreePBXsecurity-reportingAffected
  • >=17.0.1 <17.0.7
Fixed in
  • 17.0.7
FreePBXsecurity-reportingAffected
  • >=15.0.42 <16.0.45
Fixed in
  • 16.0.45

AI-suggested

This vulnerability is fixed in FreePBX versions 16.0.45 and 17.0.7. Administrators should upgrade to these or later versions to remediate the issue. Until upgraded, administrators must ensure that the hard-coded initial template credentials for the User Control Panel are changed immediately after enabling UCP to prevent unauthorized access. Patch status is not explicitly stated beyond the fixed versions; therefore, verify the vendor advisory for the latest remediation guidance.

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.

References

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