PT-2026-55323 · Watchguard · Fireware Os

Published 2026-07-02 · Updated 2026-07-03 · CVE-2026-13053

Positive Technologies (AI Summary)

CVSS v4.0

8.6

High

Base vector

AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions WatchGuard Fireware OS versions 11.0 through 11.12.4 Update1 WatchGuard Fireware OS versions 12.0 through 12.12 WatchGuard Fireware OS versions 2025.1 through 2026.2

Description An Out-of-bounds Write issue exists in the CLI, where an authenticated privileged user can execute arbitrary code by providing a specially crafted CLI command. An Out-of-bounds Write occurs when a program writes data past the end of the intended buffer, potentially corrupting memory.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-13053

Affected Products

Fireware Os

References · 4

• https://watchguard.com/wgrd-psirt/advisory/wgsa-2026-00030 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-13053 · Security Note
• https://twitter.com/infoflowcloud/status/2072868191412371742 · Twitter Post
• https://twitter.com/CVEnew/status/2072867212461826085 · Twitter Post