CVE-2026-86133

HIGHCVSS 7.5

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.

Timeline

Published:September 30th, 2026 12:16 AM

Last modified:October 6th, 2026 8:28 PM

CVSS Scoring

CVSS v3: 7.5 (HIGH)

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

Affected Software

From NVD CPE configuration data

Vendors

watchguard

Products

fireware

Weaknesses (CWE)

CWE-191 CWE-1284

References & Reports

Advisories, patches, and third-party reports

https://psirt.watchguard.com/CVE-2026-86133Patch

Source: NIST NVD · Data may lag official sources by up to one minute