High severity8.8NVD Advisory· Published Jul 3, 2026· Updated Aug 28, 2026
CVE-2026-8247
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
4cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*range: >=11.0.0,<11.12.4
- cpe:2.3:o:watchguard:fireware:11.12.4:-:*:*:*:*:*:*
- cpe:2.3:o:watchguard:fireware:11.12.4:u1:*:*:*:*:*:*
- (no CPE)range: 11.0 - 11.12.4_Update1, 12.0 - 12.12, 2025.1 - 2026.2
Patches
Vulnerability mechanics
References
2- www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00026nvdVendor Advisory
- psirt.watchguard.com/CVE-2026-8247nvdBroken Link
News mentions
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