Null Pointer Dereference in WatchGuard Fireware OS
CVE-2026-13084

8.7HIGH

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
2 July 2026

Badges

👾 Exploit Exists

What is CVE-2026-13084?

A null pointer dereference vulnerability found in WatchGuard's Fireware OS can be exploited by remote unauthenticated attackers to trigger a denial-of-service (DoS) condition. This is achieved by sending specially crafted IKEv2 messages, affecting the Mobile User VPN and Branch Office VPN when configured with a dynamic gateway peer. The vulnerability is present in multiple versions of Fireware OS, leaving many systems open to potential disruption.

Affected Version(s)

Fireware OS Default 2025.1 < 2026.2.1

Fireware OS Default 12.0 < 12.12.1

Fireware OS Default 11.10.2

References

https://psirt.watchguard.com/CVE-2026-13084
vendor-advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-...
vendor-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.