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-2026-55332

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-2026-55336

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

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...

WatchGuard Firebox Fireware OS 安全漏洞

WatchGuard Firebox Fireware OS is an operating system developed by the American company WatchGuard, designed to provide security protection and traffic control capabilities for firewall devices. Vulnerabilities exist in versions 12.6.1 to 12.11.8, as well as in versions 2025.1 to 2026.1.2 of...

PT-2026-29637

Name of the Vulnerable Software and Affected Versions WatchGuard Firebox systems with Fireware OS versions 12.6.1 through 12.11.8 and 2025.1 through 2026.1.2 Description A path traversal vulnerability exists in the Fireware OS Web UI. A privileged, authenticated remote attacker may be able to...

CVE-2026-3987: Improper Limitation of a Pathname to a Restricted Directory

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-2026-4315

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.This issue affects Fireware OS: 11....

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.This issue affects Fireware OS: 12.1 through 12.11.8 and 2025.1...

EUVD-2026-17081

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.This issue affects Fireware OS: 11....

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

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 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...