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High severity7.5NVD Advisory· Published Dec 4, 2025· Updated Aug 10, 2026

CVE-2025-11838

CVE-2025-11838

Description

A memory corruption vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker to trigger a Denial of Service (DoS) condition in the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer.

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Affected products

3
  • WatchGuard/Fireware3 versions
    cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*range: >=2025.1,<2025.1.3
    • (no CPE)range: 12.6.1 - 12.11.4, 2025.1 - 2025.1.2
    • (no CPE)range: 12.6.1

Patches

Vulnerability mechanics

References

2

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