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

Published Aug 27, 2026
·
Updated

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 Software

1 affected component
WatchGuard Fireware OS

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade WatchGuard Fireware OS iked to a version that resolves this vulnerability.

    Fixed in 2026.2.2
  2. Upgrade

    Upgrade WatchGuard Fireware OS iked to a version that resolves this vulnerability.

    Fixed in 12.12.2
  3. Upgrade

    Upgrade WatchGuard Fireware OS iked to a version that resolves this vulnerability.

    Fixed in 12.5.20

Event History

Aug 27, 2026
CVE Published
via MITRE·11:24 PM
Data Sourced
via MITRE·11:24 PM
RemedyDescriptionWeakness

Company

Resources

Contact

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