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CVE-2026-13375

WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in Autotask Technology Integration Configuration

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 OS 12.4 up to and including 12.12, 12.5 up to and including 12.5.18, and 2025.1 up to and including 2026.2.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Firebox M270 Firebox M290 Firebox M295 and 37 more
CVE-2026-3344

WatchGuard Firebox System Integrity Check Bypass

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.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Firebox M270 Firebox M290 Firebox M295 and 37 more
CVE-2026-3343

WatchGuard Firebox Reflected Cross-Site-Scripting (XSS) Vulnerability in Fireware Web UI

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.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Firebox M270 Firebox M290 Firebox M295 and 35 more
CVE-2025-9242

WatchGuard Firebox iked Out of Bounds Write Vulnerability

An Out-of-bounds Write vulnerability in the WatchGuard Fireware OS iked process may allow a remote unauthenticated attacker to execute arbitrary code. This vulnerability affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer. If the Firebox was previously configured with the mobile user VPN with IKEv2 or a branch office VPN using IKEv2 to a dynamic gateway peer, and both of those configurations have since been deleted, that Firebox may still be vulnerable if a branch office VPN to a static gateway peer is still configured.

CVSS 4.0 · 9.3 Critical EPSS 92.2% KEV · Listed
Vendors
Watchguard
Products
Firebox M270 Firebox M290 Firebox M295 and 37 more
CVE-2026-3342

WatchGuard Firebox Out of Bounds Write Vulnerability

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 11.12.4_Update1, 12.0 up to and including 12.11.7 and 2025.1 up to and including 2026.1.1.

CVSS 4.0 · 8.6 High EPSS 6.4% KEV · Not listed
Vendors
Watchguard
Products
Firebox M270 Firebox M290 Firebox M295 and 37 more