CVE-2026-13053
Received Received - Intake

Out-of-bounds Write in WatchGuard Fireware OS CLI

Publication date: 2026-07-03

Last updated on: 2026-07-03

Assigner: WatchGuard Technologies, Inc.

Description
An Out-of-bounds Write vulnerability in WatchGuard Fireware OS's CLI could allow an authenticated privileged user to execute arbitrary code via a specially crafted CLI command. This vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2.

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Meta Information

Published
2026-07-03
Last Modified
2026-07-03
Generated
2026-07-03
AI Q&A
2026-07-03
EPSS Evaluated
N/A
NVD
CVE-2026-13053
EUVD
EUVD-2026-41463

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
watchguard fireware_os to 11.12.4_Update1 (inc)
watchguard fireware_os to 12.12 (inc)
watchguard fireware_os to 12.5.18 (inc)
watchguard fireware_os to 2026.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability is an Out-of-bounds Write flaw in the Management CLI Command Handler of WatchGuard Fireware OS. It allows an authenticated privileged user to execute arbitrary code by sending a specially crafted CLI command.

The affected versions include Fireware OS 11.0 through 11.12.4_Update1, 12.0 through 12.12, 12.5 through 12.5.18, and 2025.1 through 2026.2.

Compliance Impact

The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Impact Analysis

An attacker who is an authenticated privileged user could exploit this vulnerability to execute arbitrary code on the affected WatchGuard Firebox device.

This could lead to full compromise of the device, potentially allowing the attacker to manipulate network traffic, disrupt services, or gain further access to the network.

Given the high CVSS score of 8.6, the impact is considered severe.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade your WatchGuard Fireware OS to a fixed version where the issue is resolved.

  • Upgrade to Fireware OS 2026.2.1 or later.
  • Upgrade to Fireware OS 12.12.1 or later.

Note that Fireware OS 11.x versions are end-of-life and remain unresolved, so consider upgrading to a supported version.

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