CVE-2026-78009CWE-125CWE-20

CVE-2026-78009

published August 28, 2026

CVSS

8.7

EPSS

Percentile

44.9

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS: 8.7 · NONE
CVSS v4.0: 8.7 · 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
EPSS: 0.00544 · 44.9th percentile
Weaknesses: CWE-125 · Out-of-bounds Read; CWE-20 · Improper Input Validation
Published: 2026-08-28T06:16Z

References (1)

https://psirt.watchguard.com/CVE-2026-78009 · 5d1c2695-1a31-4499-88ae-e847036fd7e3

EPSS history

Timeline

27 AUG 23:24Z
Fireware OS Out-of-Bounds Read in iked Allows Unauthenticated Denial of Service (DoS)
cvelistv5