CVE-2026-78009 HIGH

CVE-2026-78009: Fireware OS Out-of-Bounds Read in iked Allows Unauthenticated Denial of Service (DoS)

Vendor Watchguard
Product Fireware OS
Weakness CWE-125
Published August 27, 2026
Last update August 28, 2026
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

An out-of-bounds read 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.

Key dates

02Disclosure timeline

August 27, 2026 CVE published
August 28, 2026 Record updated