High [CVE-2026-13383] Out-of-bounds Write vulnerability in WatchGuard Fireware OS ikestubd process could allow an authenticated privileged user to execute arbitrary code via a specially crafted requests to the Management Web UI
This high-severity WatchGuard advisory covers CVE-2026-13383 affecting Fireware OS.
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Summary
An Out-of-bounds Write vulnerability in WatchGuard Fireware OS ikestubd process could allow an authenticated privileged user to execute arbitrary code via a specially crafted requests to the Management Web UI.
- Fireware OS 2025.1 before 2026.2.1
- Fireware OS 12.1 before 12.12.1
- Fireware OS 12.1 before 12.11.9
- Fireware OS 12.1 before 12.5.19
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
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