CVE-2026-8247

WatchGuard Firebox admd Out of Bounds Write Vulnerability

CVSS 7.7 HIGHEPSS 0.2%CWE-120

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.7EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

02 Jul 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

WatchGuard · Fireware OS

References

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