CVE-2026-8247

HIGH

WatchGuard Firebox admd Out of Bounds Write Vulnerability

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v4 7.7
EPSS 0.0020
EPSS Percentile 10.2%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-120
Status published
Products (4)
WatchGuard/Fireware OS 11.0 - 11.12.4+541730
WatchGuard/Fireware OS 12.0 - 12.12
WatchGuard/Fireware OS 12.5 - 12.5.18
WatchGuard/Fireware OS 2025.1 - 2026.2
Published Jul 03, 2026
Tracked Since Jul 03, 2026