CVE-2026-18105
Received Received - Intake

Uncontrolled Resource Consumption in Fireware OS Diagnostic Tasks

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: WatchGuard Technologies, Inc.

Description
An uncontrolled resource consumption vulnerability in Fireware OS's diagnostic tasks feature allows a low-privileged, authenticated user to cause a denial of service of the system's diagnostic tools by repeatedly starting and aborting a specially crafted diagnostic task through the web UI.

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Meta Information

Published
2026-09-30
Last Modified
2026-09-30
Generated
2026-09-30
AI Q&A
2026-09-30
EPSS Evaluated
N/A
NVD
CVE-2026-18105
EUVD
EUVD-2026-89493

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
watchguard fireware_os From 2025.0 (inc) to 2026.3.2 (inc)
watchguard fireware_os From 12.0 (inc) to 12.12.3 (inc)
watchguard fireware_os From 12.0 (inc) to 12.5.21 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.
CWE-770 The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

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Executive Summary

This vulnerability is an uncontrolled resource consumption issue in Fireware OS's diagnostic tasks feature. A low-privileged, authenticated user can repeatedly start and abort a specially crafted diagnostic task through the web UI, causing a denial of service for the system's diagnostic tools.

Detection Guidance

Monitor for unusual diagnostic task activity in Fireware OS logs. Check for repeated start/abort cycles of diagnostic tasks via the web UI. Inspect system resource usage for spikes during diagnostic operations.

Impact Analysis

This vulnerability can cause the diagnostic tools on your Fireware OS system to become unavailable, disrupting troubleshooting and monitoring capabilities. It may lead to system instability or reduced performance during an attack.

Mitigation Strategies

Upgrade Fireware OS to versions 2026.3.2, 2026.2.3, 12.12.3, or 12.5.21. Restrict user access to diagnostic tools to prevent unauthorized task initiation. Monitor network traffic for suspicious activity targeting diagnostic features.

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