---
id: CVE-2026-26035
title: >-
  An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet
  FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0
  through 7.4.11, FortiWeb 7.2.0 through 7.2.12, FortiWeb 7.0.0 through 7.0.12
  may allo…
summary: >-
  An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet
  FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0
  through 7.4.11, FortiWeb 7.2.0 through 7.2.12, FortiWeb 7.0.0 through 7.0.12
  may allo…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-287
vendor: fortinet
product: fortiweb
affected:
  - 'fortiweb >= 7.2.0, < 7.2.13'
  - 'fortiweb >= 7.4.0, < 7.4.12'
  - 'fortiweb >= 7.6.0, < 7.6.7'
  - 'fortiweb >= 8.0.0, < 8.0.3'
patched:
  - fortiweb 8.0.3
published: '2026-08-12'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:02:41.893'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-26035'
references:
  - url: 'https://fortiguard.fortinet.com/psirt/FG-IR-26-158'
    label: psirt@fortinet.com
tags:
  - nvd
epss: 0.0075
epssPercentile: 0.52927
ingestedAt: '2026-09-08T21:11:12.275Z'
---

## Overview

An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11, FortiWeb 7.2.0 through 7.2.12, FortiWeb 7.0.0 through 7.0.12 may allow a remote unauthenticated attacker to login into the Fortiweb GUI/CLI with a random username and password

## Affected

- `fortiweb >= 7.2.0, < 7.2.13`
- `fortiweb >= 7.4.0, < 7.4.12`
- `fortiweb >= 7.6.0, < 7.6.7`
- `fortiweb >= 8.0.0, < 8.0.3`

## Remediation

Upgrade past the affected range:

- `fortiweb 8.0.3`