Vulnerability in WatchGuard Fireware OS

[ Description ]Official description

An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a specially crafted encrypted IKEv2 message, resulting in a denial of service.

[ Fixes ]Fixes and patches

• Patch on psirt.watchguard.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Advisories ]Government CERT advisories

• NCSC-NL7 Oct 2026NCSC-2026-0404

  Vulnerabilities fixed in WatchGuard Fireware OS Translated from Dutch

  Probability/damage M/HCVE-2026-13046CVE-2026-13224CVE-2026-13225+18 more CVEs
• BSI CERT-Bund29 Sep 2026WID-SEC-2026-3646

  WatchGuard Fireware OS: Multiple vulnerabilities Translated from German

  CVE-2026-86104CVE-2026-86136CVE-2026-86105+12 more CVEs

[ References ]References

• psirt.watchguard.com/CVE-2026-86133PatchVendor Advisory