Description
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.
Published: 2026-09-29
Score: 8.2 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

Vendor Solution

Fireware OS 2026.3.2, Fireware OS 2026.2.3, Fireware OS 12.12.3, Fireware OS 12.5.21

Tracking

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Advisories

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History

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

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', '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 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.
Title Fireware OS Pre-Authentication Integer Underflow in iked Allows Denial of Service
First Time appeared Watchguard
Watchguard fireware Os
Weaknesses 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'}


Subscriptions

Watchguard Fireware Os
cve-icon MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published:

Updated: 2026-09-30T15:28:13.842Z

Reserved: 2026-09-05T02:57:30.608Z

Link: CVE-2026-86132

cve-icon Vulnrichment

Updated: 2026-09-30T15:25:43.814Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-30T00:16:36.957

Modified: 2026-09-30T16:40:50.560

Link: CVE-2026-86132

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T09:00:07Z

Weaknesses
  • CWE-191

    Integer Underflow (Wrap or Wraparound)