CVE-2026-73661

FreePBX: Authenticated Framework AUTHTYPE Can Be Restored From a Crafted Backup

MEDIUM
6.5
CVSS Score
Published: August 13, 2026 at 09:25 PM UTC
Updated: October 9, 2026 at 07:44 PM UTC
2 products affected across 2 vendorsFreePBXFramework

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

FreePBX is an open source IP PBX. Prior to 16.0.47 and 17.0.30, the FreePBX Framework module permits a crafted backup to restore the hidden AUTHTYPE setting with the value none through runRestore() in amp_conf/htdocs/admin/libraries/Builtin/Restore.php. An authenticated user with sufficient backup-restore access or write access to backup files can thereby disable FreePBX authentication during restoration, bypassing the user-interface removal of AUTHTYPE=none. This issue is fixed in versions 16.0.47 and 17.0.30.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

16.0 ≤ v < 16.0.4717.0 ≤ v < 17.0.30*
v < 16.0.47>= 17.0.1, < 17.0.30
Affected range stops below 16.0.47, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.0.30, so it looks safe — our inference, not a vendor statement

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-15

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