High [CVE-2026-8247] 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 high-severity WatchGuard advisory covers CVE-2026-8247 affecting Fireware OS.
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Summary
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.
- through 11.12.4_Update1
- through 12.12
- through 2026.2
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 2026.2.1
- 12.12.1
- 12.11.9
- 12.5.19
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
Upgrade to a fixed release: 2026.2.1, 12.12.1, 12.11.9, 12.5.19. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Discussion(0)
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