CVE-2026-86105#
Fireware OS Improper Authorization in Access Portal Reverse Proxy
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 request for a different resource which they are authorized to access.
Product status #
| Product | Affected | Not affected |
|---|---|---|
| Fireware OS | ||
| Default | >= 2026.3, < 2026.3.2, >= 2025.0, < 2026.2.3, >= 12.0, < 12.12.3 | >= 2026.3.2, >= 2026.2.3, >= 12.12.3 |
| T15/T35 | >= 12.0, < 12.5.21 | >= 12.5.21 |
Weakness Type and Impact #
- CWECWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- CWECWE-176Improper Handling of Unicode Encoding
- CWECWE-285Improper Authorization
- CAPECCAPEC-1Accessing Functionality Not Properly Constrained by ACLs
- CAPECCAPEC-64Using Slashes and URL Encoding Combined to Bypass Validation Logic
- CAPECCAPEC-139Relative Path Traversal
Exploitation Status #
WatchGuard is not aware of any exploitation of this vulnerability in the wild.
Solution #
Fireware OS 2026.3.2, Fireware OS 2026.2.3, Fireware OS 12.12.3, Fireware OS 12.5.21
References #
Credits #
- WatchGuard AI Security Researchfinder
- Laurent GAFFIE , secorizon.comfinder