CVE-2026-86105 - Vulnerability Details - OpenCVE

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.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Vendors	Products
Watchguard Subscribe	Fireware Os Subscribe

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

Fireware OS 2026.3.2, Fireware OS 2026.2.3, Fireware OS 12.12.3, Fireware OS 12.5.21

Workaround

No workaround given by the vendor.

References

Link	Providers
https://psirt.watchguard.com/CVE-2026-86105

History

Tue, 29 Sep 2026 23:30:00 +0000

Type	Values Removed	Values Added
Description		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.
Title		Fireware OS Improper Authorization in Access Portal Reverse Proxy
First Time appeared		Watchguard Watchguard fireware Os
Weaknesses		CWE-176 CWE-22 CWE-285
CPEs		cpe:2.3:a:watchguard:fireware_os::::::::
Vendors & Products		Watchguard Watchguard fireware Os
References		https://psirt.watchguard.com/CVE-2026-86105
Metrics		cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published: 2026-09-29T23:05:47.554Z

Updated: 2026-09-29T23:05:47.554Z

Reserved: 2026-09-05T00:16:03.449Z

Link: CVE-2026-86105

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-09-30T00:16:36.550

Modified: 2026-09-30T00:16:36.550

Link: CVE-2026-86105

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

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