PT-2026-55335 · Watchguard · Fireware Os

Cody Sixteen · Published 2026-07-02 · Updated 2026-07-03 · CVE-2026-13384

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 12.1 through 12.12 WatchGuard Fireware OS versions 2025.1 through 2026.2

Description An Out-of-bounds Write issue exists in the wgagent process. This flaw allows an authenticated privileged user to execute arbitrary code by sending specially crafted requests to the Management Web UI. 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-2026-13384

Affected Products

Fireware Os

References · 4

• https://watchguard.com/wgrd-psirt/advisory/wgsa-2026-00021 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-13384 · Security Note
• https://twitter.com/CVEnew/status/2072867226114310174 · Twitter Post
• https://twitter.com/infoflowcloud/status/2072868275164262550 · Twitter Post