CVE-2026-8247 HIGH

CVE-2026-8247: WatchGuard Firebox admd Out of Bounds Write Vulnerability

Vendor Watchguard
Product Fireware OS
Weakness CWE-120
Published July 2, 2026
Last update July 7, 2026
View on NVD All CVEs

CVSS base score

7.7/10
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 2, 2026 CVE published
July 7, 2026 Record updated