CVE-2026-78011 — Fireware OS Integer Underflow in Iked Allows Unauthenticated Denial of Service (DoS)

CVE-2026-78011

Fireware OS Integer Underflow in Iked Allows Unauthenticated Denial of Service (DoS) PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
WatchGuard / Fireware OS	affected 2025.0 before 2026.2.2; affected 12.0 before 12.12.2; affected 2026.3 before 2026.3.1
WatchGuard / Fireware OS	affected 12.0 before 12.5.20

CWE

CWE-191, CWE-787

References

https://psirt.watchguard.com/CVE-2026-78011

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.