WatchGuard Fireware OS up to 12.5.13/12.11.4/2025.1.2 CLI out-of-bounds write

Summaryinfo

A vulnerability identified as critical has been detected in WatchGuard Fireware OS up to 12.5.13/12.11.4/2025.1.2. Affected is an unknown function of the component CLI. This manipulation causes out-of-bounds write. The identification of this vulnerability is CVE-2025-12026. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in WatchGuard Fireware OS up to 12.5.13/12.11.4/2025.1.2 and classified as critical. Affected by this vulnerability is some unknown functionality of the component CLI. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS’s certificate request command could allow an authenticated privileged user to execute arbitrary code via specially crafted CLI commands.This vulnerability affects Fireware OS 12.0 up to and including 12.11.4, 12.5 up to and including 12.5.13, and 2025.1 up to and including 2025.1.2.

The weakness was shared by Cody Sixteen as wgsa-2025-00017. It is possible to read the advisory at watchguard.com. This vulnerability is known as CVE-2025-12026 since 10/21/2025. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/11/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-201307). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• WatchGuard

Name

• Fireware OS

Version

• 12.5.0
• 12.5.1
• 12.5.2
• 12.5.3
• 12.5.4
• 12.5.5
• 12.5.6
• 12.5.7
• 12.5.8
• 12.5.9
• 12.5.10
• 12.5.11
• 12.5.12
• 12.5.13
• 12.11.0
• 12.11.1
• 12.11.2
• 12.11.3
• 12.11.4
• 2025.1.0
• 2025.1.1
• 2025.1.2

License

• commercial

CPE 2.3info

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CPE 2.2info

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• 🔒
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Exploitinginfo

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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