Type Confusion Vulnerability in WatchGuard Fireware OS
CVE-2026-19315

9.3CRITICAL

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
27 August 2026

Badges

👾 Exploit Exists

What is CVE-2026-19315?

A type confusion vulnerability in the iked process of WatchGuard Fireware OS enables remote unauthenticated attackers to execute arbitrary code by sending specially crafted network packets. This security flaw poses significant risks to organizations utilizing WatchGuard's security products, potentially allowing attackers to gain unauthorized access and control over affected systems.

Affected Version(s)

Fireware OS Default 2025.0 < 2026.2.2

Fireware OS Default 12.0 < 12.12.2

Fireware OS Default 2026.3 < 2026.3.1

References

https://psirt.watchguard.com/CVE-2026-19315
vendor-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
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

McCaulay Hudson (@_McCaulay) of watchTowr
.