Unrated severityNVD Advisory· Published Jul 2, 2026· Updated Jul 7, 2026
WatchGuard Firebox admd Out of Bounds Write Vulnerability
CVE-2026-8247
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.
Affected products
1- Range: 11.0 <= v <= 11.12.4_Update1, 12.0 <= v <= 12.12, 2025.1 <= v <= 2026.2
Patches
Vulnerability mechanics
References
1- www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00026mitrevendor-advisory
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