CVE-2026-86133

HighCVSS 7.5/10Last modified Oct 6, 2026

Description

An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a specially crafted encrypted IKEv2 message, resulting in a denial of service.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-191CWE-1284

Affected software

VendorProductVersions
WatchGuardFireware OS>= 2026.3, < 2026.3.2; >= 2025.0, < 2026.2.3; >= 12.0, < 12.12.3
WatchGuardFireware OS>= 12.0, < 12.5.21

References

Timeline

Published
Sep 30, 2026
Last modified
Oct 6, 2026
NVD status
Analyzed

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CVE-2026-86133: High severity, CVSS 7.5 | Vulnix