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.
History

Tue, 06 Oct 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Watchguard fireware
CPEs cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*
Vendors & Products Watchguard fireware
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Wed, 30 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 29 Sep 2026 23:30:00 +0000

Type Values Removed Values Added
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.
Title Fireware OS Pre-Authentication Integer Underflow in iked Allows Remote Denial of Service
First Time appeared Watchguard
Watchguard fireware Os
Weaknesses CWE-1284
CWE-191
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*
Vendors & Products Watchguard
Watchguard fireware Os
References
Metrics cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published: 2026-09-29T23:05:47.652Z

Updated: 2026-09-30T15:28:13.147Z

Reserved: 2026-09-05T03:00:39.457Z

Link: CVE-2026-86133

cve-icon Vulnrichment

Updated: 2026-09-30T15:25:37.188Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-30T00:16:37.087

Modified: 2026-10-06T20:28:50.903

Link: CVE-2026-86133

cve-icon Redhat

No data.