P4Verified

CVE-2026-86131: fireware from 12.0 (inclusive), before 12.5.21 (exclusive), from 12.12 (inclusive), before 12.12.3 (exclusive), from…

CVE-2026-86131. CVSS 3.1 base score 9.8 (CRITICAL, NVD). EPSS 0.0036 (percentile 0.27492), scored 2026-10-05.

Affected technology

fireware · from 12.0 (inclusive), before 12.5.21 (exclusive)
watchguard

fireware · from 12.12 (inclusive), before 12.12.3 (exclusive)
watchguard

fireware · from 2025.0 (inclusive), before 2026.2.3 (exclusive)
watchguard

fireware · from 2026.3 (inclusive), before 2026.3.2 (exclusive)
watchguard

Fireware OS · 2026.3 to before 2026.3.2, 2025.0 to before 2026.2.3, 12.0 to before 12.12.3
WatchGuard

Fireware OS · 12.0 to before 12.5.21
WatchGuard

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Source advisory’s CVSS 4.0 assessment (base score 9.2/10) rates confidentiality, integrity and availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 2026-10-07 02:35:16.501646+00:00

CWE: CWE-94, CWE-295, CWE-829
CCR priority: 39.3 /100 (P4)
CVSS 3.1: 9.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · NVD
EPSS: 0.0036 · percentile 0.27492 · 2026-10-05
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-07 02:34:12.333111+00:00 UTC
GitHub Advisory Database · Source record · observed 2026-10-07 02:36:03.777225+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-86131.html