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Unrated severityCISA KEVNVD Advisory· Published Sep 17, 2025· Updated Feb 26, 2026

WatchGuard Firebox iked Out of Bounds Write Vulnerability

CVE-2025-9242

Description

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow a remote unauthenticated attacker to execute arbitrary code. This vulnerability affects both the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer.This vulnerability affects Fireware OS 11.10.2 up to and including 11.12.4_Update1, 12.0 up to and including 12.11.3 and 2025.1.

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Affected products

2
  • WatchGuard/Firewarellm-fuzzy2 versions
    <=11.12.4_Update1, <=12.11.3, <=2025.1+ 1 more
    • (no CPE)range: <=11.12.4_Update1, <=12.11.3, <=2025.1
    • (no CPE)range: 12.0

Patches

Vulnerability mechanics

References

1

News mentions

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CVE-2025-9242 · VYPR