CVE-2026-18105CWE-400CWE-770denial-of-service

CVE-2026-18105

Medium · published September 30, 2026

CVSS v3.1

6.5

EPSS

Percentile

14.2

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 6.5 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0: 7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS: 0.00240 · 14.2th percentile
Weaknesses: CWE-400 · Uncontrolled Resource Consumption; CWE-770 · Allocation of Resources Without Limits or Throttling
Published: 2026-09-30T04:16Z

Affected products (4)

Product	Versions	Fixed in
watchguard/fireware	≥ 12.0, < 12.5.21	12.5.21
watchguard/fireware	≥ 12.12, < 12.12.3	12.12.3
watchguard/fireware	≥ 2025.0, < 2026.2.3	2026.2.3
watchguard/fireware	≥ 2026.3, < 2026.3.2	2026.3.2

References (1)

https://psirt.watchguard.com/CVE-2026-18105 · 5d1c2695-1a31-4499-88ae-e847036fd7e3

EPSS history

Timeline

01 OCT 03:44Z
EPSS moved — → 0%
epss
29 SEP 23:05Z
Fireware OS Uncontrolled Resource Consumption in Diagnostic Tasks Allows Denial of Service
cvelistv5