CVE-2026-86101CWE-285CWE-863broken-access-control

CVE-2026-86101

Medium · published September 30, 2026

CVSS v3.1

6.5

EPSS

Percentile

12.0

In the wild

Unconfirmed

What it is

An improper authorization vulnerability in WatchGuard Fireware OS's SAML login process allows a remote, authenticated SAML user with access only to the Access Portal to obtain unauthorized Mobile VPN with SSL access through a specially crafted request.

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:H/I:N/A:N
CVSS v4.0: 7.2 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:H/SA:N
EPSS: 0.00221 · 12.0th percentile
Weaknesses: CWE-285 · Improper Authorization; CWE-863 · Incorrect Authorization
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-2026-86101 · 5d1c2695-1a31-4499-88ae-e847036fd7e3

EPSS history

Timeline

01 OCT 03:49Z
EPSS moved — → 0%
epss
29 SEP 23:05Z
Fireware OS Authorization Bypass in SAML Login Allows Unauthorized SSLVPN Access
cvelistv5