WatchGuard Fireware OS up to 11.12.4+541730/12.5.18/12.12/2026.2 Requests out-of-bounds write

Summaryinfo

A vulnerability labeled as critical has been found in WatchGuard Fireware OS up to 11.12.4+541730/12.5.18/12.12/2026.2. This impacts an unknown function of the component Requests Handler. Such manipulation leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2026-13050. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in WatchGuard Fireware OS up to 11.12.4+541730/12.5.18/12.12/2026.2. Affected by this issue is an unknown part of the component Requests Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS networkd process could allow an authenticated privileged user to execute arbitrary code via a specially crafted requests to the Management Web UI.This vulnerability affects Fireware OS 11.8 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.

The weakness was disclosed by Nicholas Zubrisky as wgsa-2026-00029. The advisory is available at watchguard.com. This vulnerability is handled as CVE-2026-13050 since 06/23/2026. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/03/2026).

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

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Productinfo

Vendor

• WatchGuard

Name

• Fireware OS

Version

• 11.12.4+541730
• 12.0
• 12.1
• 12.2
• 12.3
• 12.4
• 12.5
• 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
• 12.5.14
• 12.5.15
• 12.5.16
• 12.5.17
• 12.5.18
• 12.6
• 12.7
• 12.8
• 12.9
• 12.10
• 12.11
• 12.12
• 2026.0
• 2026.1
• 2026.2

License

• commercial

CPE 2.3info

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CPE 2.2info

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