---
id: CVE-2026-86105
title: >-
  An improper authorization vulnerability in Fireware OS's Access Portal reverse
  proxy allows an authenticated, low-privileged Access Portal user to access
  other web applications they are not authorized for by sending a specially
  crafted r…
summary: >-
  An improper authorization vulnerability in Fireware OS's Access Portal reverse
  proxy allows an authenticated, low-privileged Access Portal user to access
  other web applications they are not authorized for by sending a specially
  crafted r…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-22
  - CWE-176
  - CWE-285
vendor: watchguard
product: fireware
affected:
  - 'fireware >= 12.0, < 12.5.21'
  - 'fireware >= 12.12, < 12.12.3'
  - 'fireware >= 2025.0, < 2026.2.3'
  - 'fireware >= 2026.3, < 2026.3.2'
patched:
  - fireware 2026.3.2
published: '2026-09-30'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T20:47:02.657'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86105'
references:
  - url: 'https://psirt.watchguard.com/CVE-2026-86105'
    label: 5d1c2695-1a31-4499-88ae-e847036fd7e3
tags:
  - nvd
  - cve.org
epss: 0.00308
epssPercentile: 0.23462
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-30T14:39:57.813731Z'
scores:
  nvd: 7.1
  cna: 5.3
ingestedAt: '2026-09-29T23:52:50.547Z'
---

## Overview

An improper authorization vulnerability in Fireware OS's Access Portal reverse proxy allows an authenticated, low-privileged Access Portal user to access other web applications they are not authorized for by sending a specially crafted request for a different resource which they are authorized to access.

## Affected

- `fireware >= 12.0, < 12.5.21`
- `fireware >= 12.12, < 12.12.3`
- `fireware >= 2025.0, < 2026.2.3`
- `fireware >= 2026.3, < 2026.3.2`

## Remediation

Upgrade past the affected range:

- `fireware 2026.3.2`