---
id: CVE-2024-55599
title: >-
  An Improperly Implemented Security Check for Standard vulnerability [CWE-358]
  in FortiOS version 7.6.0, version 7.4.7 and below, 7.0 all versions, 6.4 all
  versions and FortiProxy version 7.6.1 and below, version 7.4.8 and below, 7.2
  all …
summary: >-
  An Improperly Implemented Security Check for Standard vulnerability [CWE-358]
  in FortiOS version 7.6.0, version 7.4.7 and below, 7.0 all versions, 6.4 all
  versions and FortiProxy version 7.6.1 and below, version 7.4.8 and below, 7.2
  all …
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:X/RC:X'
cvssSource: cna
cwe:
  - CWE-358
vendor: Fortinet
product: FortiOS
affected:
  - FortiOS 7.6.0
  - FortiOS >= 7.4.0 <= 7.4.7
  - FortiOS >= 7.2.0 <= 7.2.10
  - FortiOS >= 7.0.0 <= 7.0.17
  - FortiOS >= 6.4.0 <= 6.4.16
  - FortiProxy >= 7.6.0 <= 7.6.1
  - FortiProxy >= 7.4.0 <= 7.4.8
  - FortiProxy >= 7.2.0 <= 7.2.14
  - FortiProxy >= 7.0.0 <= 7.0.21
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2025-07-08T20:41:00.982835Z'
published: '2025-07-08'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T00:59:12.815Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2024-55599'
references:
  - url: 'https://fortiguard.fortinet.com/psirt/FG-IR-24-053'
    label: 'https://fortiguard.fortinet.com/psirt/FG-IR-24-053'
tags:
  - cve.org
epss: 0.00399
epssPercentile: 0.34017
ingestedAt: '2026-10-15T04:46:37.342Z'
---

## Overview

An Improperly Implemented Security Check for Standard vulnerability [CWE-358] in FortiOS version 7.6.0, version 7.4.7 and below, 7.0 all versions, 6.4 all versions and FortiProxy version 7.6.1 and below, version 7.4.8 and below, 7.2 all versions, 7.0 all versions may allow a remote unauthenticated user to bypass the DNS filter via Apple devices.

## Affected

- `FortiOS 7.6.0`
- `FortiOS >= 7.4.0 <= 7.4.7`
- `FortiOS >= 7.2.0 <= 7.2.10`
- `FortiOS >= 7.0.0 <= 7.0.17`
- `FortiOS >= 6.4.0 <= 6.4.16`
- `FortiProxy >= 7.6.0 <= 7.6.1`
- `FortiProxy >= 7.4.0 <= 7.4.8`
- `FortiProxy >= 7.2.0 <= 7.2.14`
- `FortiProxy >= 7.0.0 <= 7.0.21`

## Remediation

Please upgrade to FortiOS version 7.6.1 or above 
Please upgrade to FortiOS version 7.4.8 or above 
Please upgrade to FortiOS version 7.2.11 or above 
Please upgrade to FortiProxy version 7.6.2 or above 
Please upgrade to FortiProxy version 7.4.9 or above 
Please upgrade to FortiSASE version 24.4.b or above