CVE-2026-13377 WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in SIP Proxy Configuration

Improper Neutralization of Input During Web Page Generation XSS or 'Cross-site Scripting' vulnerability in WatchGuard Fireware OS SIP Proxy module allows Stored XSS. This vulnerability is an additional unmitigated attack path for CVE-2025-6947...

CVE-2026-13377

WatchGuard Fireware OS SIP Proxy module is affected by a Stored XSS via improper input neutralization during web page generation. The vulnerability affects Fireware OS versions 12.0–12.12, 12.5–12.5.18, and 2025.1–2026.2. Root cause: improper sanitization in the SIP Proxy configuration web interf...

CVE-2026-13376

CVE-2026-13376 affects WatchGuard Firebox via the Fireware OS spamBlocker module. Vulnerable component: spamBlocker in Fireware OS; vulnerable versions: Fireware OS 12.0–12.12, 12.5–12.5.18, and 2025.1–2026.2. Description: Improper Neutralization of Input During Web Page Generation leading to Sto...

CVE-2026-13375

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...

CVE-2026-13375

WatchGuard Fireware OS Autotask Technology Integration module is affected by CVE-2026-13375, a Stored XSS vulnerability. Affected versions are Fireware OS 12.4–12.12, 12.5–12.5.18, and 2025.1–2026.2. Attack vector is NETWORK with low attack complexity and high privileges required; user interactio...

CVE-2026-13374

CVE-2026-13374 is a stored XSS vulnerability in WatchGuard Fireware OS (ConnectWise Technology Integration module). It affects Fireware OS versions 12.4–12.12, 12.5–12.5.18, and 2025.1–2026.2. The issue stems from improper neutralization of input during web page generation, allowing stored cross-...

CVE-2026-13373

WatchGuard Fireware OS Tigerpaw Technology Integration module is affected by CVE-2026-13373, exposing a Stored Cross-Site Scripting (XSS) vulnerability. The issue arises from improper neutralization of input during web page generation, enabling stored XSS in affected Fireware versions: 12.4–12.12...

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-2026-55330

Improper Neutralization of Input During Web Page Generation XSS or 'Cross-site Scripting' vulnerability in WatchGuard Fireware OS ConnectWise Technology Integration module allows Stored XSS. This vulnerability is an additional unmitigated attack path for CVE-2025-13937. This issue affects Firewar...

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-2026-55322

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-2026-55333

Improper Neutralization of Input During Web Page Generation XSS or 'Cross-site Scripting' vulnerability in WatchGuard Fireware OS SIP Proxy module allows Stored XSS. This vulnerability is an additional unmitigated attack path for CVE-2025-6947. This issue affects Fireware OS 12.0 up to and...

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-2026-55332

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-2026-55339

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...

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...