---
id: CVE-2026-22153
title: >-
  An Authentication Bypass by Primary Weakness vulnerability [CWE-305]
  vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4 may allow an
  unauthenticated attacker to bypass LDAP authentication of Agentless VPN or
  FSSO policy, when the remo…
summary: >-
  An Authentication Bypass by Primary Weakness vulnerability [CWE-305]
  vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4 may allow an
  unauthenticated attacker to bypass LDAP authentication of Agentless VPN or
  FSSO policy, when the remo…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-305
vendor: Fortinet
product: FortiOS
affected:
  - FortiOS >= 7.6.0 <= 7.6.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-02-11T04:56:21.036753Z'
published: '2026-02-10'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T15:42:05.697Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-22153'
references:
  - url: 'https://fortiguard.fortinet.com/psirt/FG-IR-25-1052'
    label: 'https://fortiguard.fortinet.com/psirt/FG-IR-25-1052'
tags:
  - cve.org
epss: 0.00748
epssPercentile: 0.5514
ingestedAt: '2026-11-06T15:54:03.988Z'
---

## Overview

An Authentication Bypass by Primary Weakness vulnerability [CWE-305] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4 may allow an unauthenticated attacker to bypass LDAP authentication of Agentless VPN or FSSO policy, when the remote LDAP server is configured in a specific way.

## Affected

- `FortiOS >= 7.6.0 <= 7.6.4`

## Remediation

Upgrade to FortiOS version 8.0.0 or above
Upgrade to FortiOS version 7.6.5 or above