CVE-2026-81851 — Fireware OS Heap-Based Buffer Overflow in iked Allows Denial of Service

CVE-2026-81851

Fireware OS Heap-Based Buffer Overflow in iked Allows Denial of Service PUBLISHED

Description (CNA)

A heap-based buffer overflow vulnerability in Fireware OS's iked process allows an authenticated administrator to crash the IKE daemon (iked), resulting in a denial of service, by saving a specially crafted configuration.

Affected (CNA)

Vendor / product	Versions
WatchGuard / Fireware OS	affected 2025.0 before 2026.2.1; affected 12.0 before 12.12.1
WatchGuard / Fireware OS	affected 12.0 before 12.11.9
WatchGuard / Fireware OS	affected 12.0 before 12.5.18

CWE

CWE-122, CWE-1284

References

https://psirt.watchguard.com/CVE-2026-81851

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.