CVE-2026-18105#
Fireware OS Uncontrolled Resource Consumption in Diagnostic Tasks Allows Denial of Service
Summary #
An uncontrolled resource consumption vulnerability in Fireware OS's diagnostic tasks feature allows a low-privileged, authenticated user to cause a denial of service of the system's diagnostic tools by repeatedly starting and aborting a specially crafted diagnostic task through the web UI.
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 #
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 #
- Brian Mariani of DigitalCanion SAfinder