Description
An Insecure Deserialization vulnerability in WatchGuard Fireware OS allows an attacker that has obtained write access to the local filesystem through another vulnerability to execute arbitrary code in the context of the portald user.This issue affects Fireware OS: 12.1 through 12.11.8 and 2025.1 through 2026.1.2. Note, this vulnerability does not affect Firebox platforms that do not support the Access Portal feature, including the T-15 and T-35.
INFO
Published Date :
2026-03-30T12:38:01.593Z
Last Modified :
2026-03-31T03:55:35.825Z
Source :
WatchGuard
AFFECTED PRODUCTS
The following products are affected by CVE-2026-4266 vulnerability.
| Vendors | Products |
|---|---|
| Watchguard |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-4266.
CVSS Vulnerability Scoring System
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability