CVE-2026-13371

An authenticated administrator can trigger a denial-of-service condition in the Fireware Management Web UI by sending malformed or crafted data to the putdata endpoint, which performs unsafe deserialization of the attacker-supplied input...

PT-2026-55337

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 WatchGuard Fireware OS on a FireCluster may use a hard-coded encryption key to encrypt saved credentials for Access Portal...

PT-2026-55335

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...

PT-2026-55326

Name of the Vulnerable Software and Affected Versions WatchGuard Fireware OS versions 11.10.2 through 11.12.4 Update1 WatchGuard Fireware OS versions 12.0 through 12.12 WatchGuard Fireware OS versions 2025.1 through 2026.2 Description A null pointer dereference occurs when the software attempts t...

PT-2026-55334

Name of the Vulnerable Software and Affected Versions Fireware OS versions 12.1 through 12.12 Fireware OS versions 2025.1 through 2026.2 Description An Out-of-bounds Write occurs in the ikestubd process, which may allow an authenticated privileged user to execute arbitrary code by sending special...

PT-2026-55331

Improper Neutralization of Input During Web Page Generation XSS or 'Cross-site Scripting' vulnerability in WatchGuard Fireware OS Autotask Technology Integration module allows Stored XSS. This vulnerability is an additional unmitigated attack path for CVE-2025-13938. This issue affects Fireware O...

PT-2026-55322

Name of the Vulnerable Software and Affected Versions WatchGuard Fireware OS versions 11.8 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 networkd process. This...

PT-2026-55329

Name of the Vulnerable Software and Affected Versions WatchGuard Fireware OS versions 12.4 through 12.12 WatchGuard Fireware OS versions 12.5 through 12.5.18 WatchGuard Fireware OS versions 2025.1 through 2026.2 Description Stored Cross-site Scripting XSS, which occurs when an application include...

PT-2026-55339

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 where an unauthenticated...

PT-2026-55328

Name of the Vulnerable Software and Affected Versions WatchGuard Firebox Management Web UI affected versions not specified Description An authenticated administrator can cause a denial-of-service condition in the Fireware Management Web UI. This occurs when malformed or crafted data is sent to th...

PT-2026-55332

Improper Neutralization of Input During Web Page Generation XSS or 'Cross-site Scripting' vulnerability in WatchGuard Fireware OS spamBlocker module allows Stored XSS. This vulnerability is an additional unmitigated attack path for CVE-2025-1071. This issue affects Fireware OS 12.0 up to and...

PT-2026-55324

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 A path traversal issue in the Management Web UI allows a privileg...

PT-2026-55336

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 2025.6.2 Description An issue exists in the backup/restore feature where firmware...

PT-2026-55323

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...

PT-2026-55333

Name of the Vulnerable Software and Affected Versions WatchGuard Fireware OS versions 12.0 through 12.12 WatchGuard Fireware OS versions 12.5 through 12.5.18 WatchGuard Fireware OS versions 2025.1 through 2026.2 Description The SIP Proxy module contains a flaw involving improper neutralization of...

PT-2026-55330

Name of the Vulnerable Software and Affected Versions WatchGuard Fireware OS versions 12.4 through 12.12 WatchGuard Fireware OS versions 12.5 through 12.5.18 WatchGuard Fireware OS versions 2025.1 through 2026.2 Description Stored Cross-site Scripting XSS exists in the ConnectWise Technology...

CVE-2026-3987

A path traversal vulnerability in the Fireware OS Web UI on WatchGuard Firebox systems may allow a privileged authenticated remote attacker to execute arbitrary code in the context of an elevated system process.This issue affects Fireware OS 12.6.1 up to and including 12.11.8 and 2025.1 up to and...

EUVD-2026-18090

A path traversal vulnerability in the Fireware OS Web UI on WatchGuard Firebox systems may allow a privileged authenticated remote attacker to execute arbitrary code in the context of an elevated system process.This issue affects Fireware OS 12.6.1 up to and including 12.11.8 and 2025.1 up to and...

CVE-2026-3987

A path traversal vulnerability in the Fireware OS Web UI on WatchGuard Firebox systems may allow a privileged authenticated remote attacker to execute arbitrary code in the context of an elevated system process...

CVE-2026-3987 WatchGuard Firebox Arbitrary File Write vis Path Traversal in Fireware Web UI

A path traversal vulnerability in the Fireware OS Web UI on WatchGuard Firebox systems may allow a privileged authenticated remote attacker to execute arbitrary code in the context of an elevated system process...