NULL Pointer Dereference in WatchGuard Fireware OS Management Interface
CVE-2026-111107

8.7HIGH

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
27 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-111107?

A NULL pointer dereference vulnerability has been identified in the management interface of WatchGuard Fireware OS. This flaw allows an unauthenticated remote attacker with network access to exploit the management interface by sending a specially crafted login request. When successfully exploited, this vulnerability can crash the management service, leading to the termination of all active administrator sessions and disrupting ongoing management operations. While device traffic processing remains unaffected, the management of the device becomes hindered, posing significant operational risks.

Affected Version(s)

Fireware OS Default 2025.1 < 2026.4

Fireware OS Default 12.0 < 12.12.4

Fireware OS T15/T35 12.0 < 12.5.22

References

https://psirt.watchguard.com/CVE-2026-111107
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

Credit

WatchGuard AI Security Research
.