---
id: CVE-2025-53379
title: >-
  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.
summary: >-
  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.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-125
vendor: fortinet
product: fortiauthenticator
affected:
  - 'fortiauthenticator >= 6.5.0, <= 6.5.7'
  - 'fortiauthenticator >= 6.6.0, <= 6.6.2'
published: '2026-07-14'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T14:10:00.117'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-53379'
references:
  - url: 'https://fortiguard.fortinet.com/psirt/FG-IR-26-146'
    label: psirt@fortinet.com
tags:
  - nvd
epss: 0.00529
epssPercentile: 0.42478
ingestedAt: '2026-09-29T14:36:14.068Z'
---

## Overview

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.

## Affected

- `fortiauthenticator >= 6.5.0, <= 6.5.7`
- `fortiauthenticator >= 6.6.0, <= 6.6.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.