Description
An integer underflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.
Published: 2026-08-27
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

Vendor Solution

Fireware OS 2026.2.2, Fireware OS 12.12.2, Fireware OS 12.5.20

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 28 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Description An integer underflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.
Title Fireware OS Integer Underflow in Iked Allows Unauthenticated Denial of Service (DoS)
First Time appeared Watchguard
Watchguard fireware Os
Weaknesses CWE-191
CWE-787
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*
Vendors & Products Watchguard
Watchguard fireware Os
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/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: 2026-08-28T16:51:49.717Z

Reserved: 2026-08-21T21:46:48.681Z

Link: CVE-2026-78011

cve-icon Vulnrichment

Updated: 2026-08-28T16:51:37.687Z

cve-icon NVD

Status : Deferred

Published: 2026-08-28T02:16:22.563

Modified: 2026-08-28T20:19:56.880

Link: CVE-2026-78011

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T07:45:04Z

Weaknesses
  • CWE-191

    Integer Underflow (Wrap or Wraparound)

  • CWE-787

    Out-of-bounds Write