CVE-2026-86132 — Fireware OS Pre-Authentication Integer Underflow in iked Allows Denial of Service

CVE-2026-86132

Fireware OS Pre-Authentication Integer Underflow in iked Allows Denial of Service PUBLISHED

Description (CNA)

An integer underflow vulnerability in the WatchGuard Fireware OS IKEv2 daemon (iked) allows a remote, unauthenticated attacker to crash the process by sending a specially crafted encrypted IKEv2 message negotiated with an AES-GCM cipher suite.

Affected (CNA)

Vendor / product	Versions
WatchGuard / Fireware OS	affected 2026.3 before 2026.3.2; affected 2025.0 before 2026.2.3; affected 12.0 before 12.12.3
WatchGuard / Fireware OS	affected 12.0 before 12.5.21

CWE

CWE-191

References

https://psirt.watchguard.com/CVE-2026-86132

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.