OpenCVE

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker on the same local network segment to execute arbitrary code. This vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2.

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Vendors	Products
Watchguard	Fireware Os

No data.

No data.

References

Link	Providers
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00026

History

Mon, 06 Jul 2026 16:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Thu, 02 Jul 2026 23:30:00 +0000

Type	Values Removed	Values Added
Description		An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker on the same local network segment to execute arbitrary code. This vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2.
Title		WatchGuard Firebox admd Out of Bounds Write Vulnerability
First Time appeared		Watchguard Watchguard fireware Os
Weaknesses		CWE-120
CPEs		cpe:2.3:a:watchguard:fireware_os::::::::11.0 cpe:2.3:a:watchguard:fireware_os::::::::12.0 cpe:2.3:a:watchguard:fireware_os::::::::12.5 cpe:2.3:a:watchguard:fireware_os::::::::2025.1
Vendors & Products		Watchguard Watchguard fireware Os
References		https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00026
Metrics		cvssV4_0 `{'score': 7.7, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}`

MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published: 2026-07-02T23:07:16.148Z

Updated: 2026-07-07T03:56:33.916Z

Reserved: 2026-05-10T12:48:43.918Z

Link: CVE-2026-8247

Vulnrichment

Updated: 2026-07-06T15:46:54.782Z

NVD

No data.

Redhat

No data.

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