CVE-2025-53379 PUBLISHED

Assigner: fortinet
Reserved: 27.06.2025 Published: 14.07.2026 Updated: 14.07.2026

A out-of-bounds read vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.2, FortiAuthenticator 6.5 all versions may allow a remote unauthenticated attacker to retrieve sensitive information via a specially crafted request.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C
CVSS Score: 7

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Fortinet
Product	FortiAuthenticator
Versions	Default: unaffected affected from 6.6.0 to 6.6.2 (incl.) affected from 6.5.0 to 6.5.7 (incl.) affected from 6.4.0 to 6.4.11 (incl.) affected from 6.3.0 to 6.3.5 (incl.)

Solutions

Upgrade to FortiAuthenticator version 6.6.3 or above

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-146

Problem Types

Information disclosure CWE