CVE-2026-4315

A Cross-Site Request Forgery CSRF vulnerability in the WatchGuard Fireware OS WebUI could allow a remote attacker to trigger a denial-of-service DoS condition in the Fireware Web UI by convincing an authenticated administrator into visiting a malicious web page...

CVE-2026-4266 WatchGuard Firebox Insecure Deserialization in Fireware Access Portal

An Insecure Deserialization vulnerability in WatchGuard Fireware OS allows an attacker that has obtained write access to the local filesystem through another vulnerability to execute arbitrary code in the context of the portald user. Note, this vulnerability does not affect Firebox platforms that...

CVE-2026-4266 WatchGuard Firebox Insecure Deserialization in Fireware Access Portal

An Insecure Deserialization vulnerability in WatchGuard Fireware OS allows an attacker that has obtained write access to the local filesystem through another vulnerability to execute arbitrary code in the context of the portald user. Note, this vulnerability does not affect Firebox platforms that...

CVE-2026-4266

CVE-2026-4266 describes an insecure deserialization in WatchGuard Fireware OS. Affects Fireware OS versions 12.1–12.11.8 and 2025.1–2026.1.2; Firebox platforms without Access Portal (e.g., T-15, T-35) are not affected. The vulnerability allows an attacker who has obtained write access to the loca...

CVE-2026-4266

An Insecure Deserialization vulnerability in WatchGuard Fireware OS allows an attacker that has obtained write access to the local filesystem through another vulnerability to execute arbitrary code in the context of the portald user. Note, this vulnerability does not affect Firebox platforms that...

CVE-2026-4315: Cross-Site Request Forgery (CSRF)

A Cross-Site Request Forgery CSRF vulnerability in the WatchGuard Fireware OS WebUI could allow a remote attacker to trigger a denial-of-service DoS condition in the Fireware Web UI by convincing an authenticated administrator into visiting a malicious web page...

WatchGuard Fireware OS security vulnerabilities

WatchGuard Fireware OS is a software operated by the American company WatchGuard, running on Firebox devices. Vulnerabilities exist in versions 11.8 to 11.12.4+541730, 12.0 to 12.11.8, and 2025.1 to 2026.1.2 of WatchGuard Fireware OS. The vulnerability stems from cross-site request forgery in the...

PT-2026-29023

Name of the Vulnerable Software and Affected Versions WatchGuard Fireware OS versions 11.8 through 11.12.4+541730 WatchGuard Fireware OS versions 12.0 through 12.11.8 WatchGuard Fireware OS versions 2025.1 through 2026.1.2 Description A Cross-Site Request Forgery CSRF issue in the Fireware OS Web...

CVE-2026-4266: Deserialization of Untrusted Data

An Insecure Deserialization vulnerability in WatchGuard Fireware OS allows an attacker that has obtained write access to the local filesystem through another vulnerability to execute arbitrary code in the context of the portald user. Note, this vulnerability does not affect Firebox platforms that...

WatchGuard Fireware OS security vulnerabilities

WatchGuard Fireware OS is a software operated by the American company WatchGuard, running on Firebox devices. Versions 12.1 to 12.11.8 and 2025.1 to 2026.1.2 of WatchGuard Fireware OS contain security vulnerabilities due to insecure deserialization, which may allow arbitrary code to be executed i...

PT-2026-29022

Name of the Vulnerable Software and Affected Versions WatchGuard Fireware OS versions 12.1 through 12.11.8 WatchGuard Fireware OS versions 2025.1 through 2026.1.2 Description An Insecure Deserialization issue exists in WatchGuard Fireware OS. An attacker gaining write access to the local filesyst...

📄 WatchGuard Firebox Default SSH Credentials

This is a python script to detect whether or not WatchGuard Firebox devices allow unauthorized access via default credentials admin:readwrite on port 4118. =============================================================================================================================================...

CVE-2026-3343

A reflected cross-site scripting XSS vulnerability in the Fireware OS Web UI enabled execution of malicious JavaScript in the context of an authenticated management user's browser when they click on a specially crafted link. This vulnerability affects Fireware OS 12.7 up to and including 12.11.7...

CVE-2026-3342

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an authenticated privileged administrator to execute arbitrary code with root permissions via an exposed management interface. This vulnerability affects Fireware OS 11.9 up to and including 11.12.4Update1, 12.0 up to and...

CVE-2026-3344

A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the Fireware OS filesystem integrity check and maintain limited persistence via a maliciously-crafted firmware update package.This issue affects Fireware OS 12.0 up to and including 12.11.7, 12.5.9 up to and including...

CVE-2026-3343

A reflected cross-site scripting XSS vulnerability in the Fireware OS Web UI enabled execution of malicious JavaScript in the context of an authenticated management user's browser when they click on a specially crafted link...

CVE-2026-3344

A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the Fireware OS filesystem integrity check and maintain limited persistence via a maliciously-crafted firmware update package...

CVE-2026-3343

A reflected cross-site scripting XSS vulnerability in the Fireware OS Web UI enabled execution of malicious JavaScript in the context of an authenticated management user's browser when they click on a specially crafted link. This vulnerability affects Fireware OS 12.7 up to and including 12.11.7...

CVE-2026-3344

A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the Fireware OS filesystem integrity check and maintain limited persistence via a maliciously-crafted firmware update package.This issue affects Fireware OS 12.0 up to and including 12.11.7, 12.5.9 up to and including...

CVE-2026-3342

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an authenticated privileged administrator to execute arbitrary code with root permissions via an exposed management interface. This vulnerability affects Fireware OS 11.9 up to and including 11.12.4Update1, 12.0 up to and...