Uncontrolled Resource Consumption Vulnerability in Fireware OS by WatchGuard
CVE-2026-18105

7.1HIGH

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
29 September 2026

Badges

👾 Exploit Exists

What is CVE-2026-18105?

An uncontrolled resource consumption vulnerability exists in the diagnostic tasks feature of Fireware OS from WatchGuard. This flaw allows an authenticated user with low privileges to exploit the system's diagnostic tools by repeatedly initiating and terminating a specifically crafted diagnostic task through the web interface, potentially leading to a denial of service condition.

Affected Version(s)

Fireware OS Default 2026.3 < 2026.3.2

Fireware OS Default 2025.0 < 2026.2.3

Fireware OS Default 12.0 < 12.12.3

References

https://psirt.watchguard.com/CVE-2026-18105
vendor-advisory

CVSS V4

Score:
7.1
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

Brian Mariani of DigitalCanion SA
.