EUVD-2026-111158

A link following vulnerability in WatchGuard Fireware OS’s firewall daemon allows a local attacker with code execution as a low-privileged system process to overwrite arbitrary files with root privileges, and to tamper with firewall IP set data, by planting a crafted file system object and...

EUVD-2026-111159

A stack-based buffer overflow vulnerability in Fireware OS's WireGuard configuration processing allows a remote attacker that has man-in-the-middle TLS-decrypted access between the Firebox and WatchGuard Cloud to create a Denial of Service condition and potentially execute arbitrary code by...

EUVD-2026-111160

A missing authentication vulnerability in Fireware OS's FireCluster state synchronization feature allows an unauthenticated attacker positioned on the cluster synchronization network segment to force premature VPN tunnel termination by sending crafted cluster synchronization traffic...

CVE-2026-104381 Fireware OS Missing Authentication in FireCluster State Sync Allows BOVPN Tunnel Denial of Service

A missing authentication vulnerability in Fireware OS's FireCluster state synchronization feature allows an unauthenticated attacker positioned on the cluster synchronization network segment to force premature VPN tunnel termination by sending crafted cluster synchronization traffic...

CVE-2026-104381

A missing authentication vulnerability exists in the Fireware OS FireCluster state synchronization feature. An unauthenticated attacker positioned on the cluster synchronization network segment can send crafted cluster synchronization traffic to force premature VPN tunnel termination , resulting ...

EUVD-2026-111157

An integer overflow vulnerability in the WebSocket connection handling used by WatchGuard Fireware OS's Access Portal allows a remote, unauthenticated attacker to write beyond the bounds of a heap buffer by sending a specially crafted request while the Access Portal feature is enabled...

PT-2026-126633

A stack-based buffer overflow vulnerability in Fireware OS's VPN Network Access Enforcement process allows an authenticated mobile VPN user to create a denial of service condition and potentially execute arbitrary code as an unprivileged process by sending a specially crafted request...

PT-2026-126630

A NULL pointer dereference vulnerability in WatchGuard Fireware OS’s management interface allows a remote, unauthenticated attacker with network access to the management interface to crash the management service by sending a specially crafted login request. Repeated exploitation terminates all...

PT-2026-126642

An XPath injection vulnerability in WatchGuard Fireware OS's SSH authentication process allows a remote, unauthenticated attacker with access to the management SSH interface to extract sensitive configuration data by submitting a specially crafted request...

PT-2026-126626

A stack-based buffer overflow vulnerability in the Fireware OS logging service allows a network-adjacent attacker who can impersonate or intercept traffic to the configured log server to execute arbitrary code with root privileges by presenting a specially crafted certificate...

PT-2026-126627

A stack-based buffer overflow vulnerability in Fireware OS's WireGuard configuration processing allows a remote attacker that has man-in-the-middle TLS-decrypted access between the Firebox and WatchGuard Cloud to create a Denial of Service condition and potentially execute arbitrary code by...

PT-2026-126639

A stack-based buffer overflow vulnerability in the Fireware OS certd process allows an authenticated attacker with access to the Firebox management interface to crash the certificate management service and potentially execute arbitrary code by sending a specially crafted request...

PT-2026-126645

A link following vulnerability in WatchGuard Fireware OS’s firewall daemon allows a local attacker with code execution as a low-privileged system process to overwrite arbitrary files with root privileges, and to tamper with firewall IP set data, by planting a crafted file system object and...

PT-2026-126646

A missing authentication vulnerability in the Fireware OS FireCluster synchronization daemon allows a remote, unauthenticated attacker to invoke privileged system-level administrative actions by sending a specially crafted request to the FireCluster management IP when the clustering feature is...

PT-2026-126643

A stack-based buffer overflow vulnerability in Fireware OS's SIP proxy allows a remote, unauthenticated attacker to execute arbitrary code by sending a specially crafted request through a policy that uses the SIP proxy...

PT-2026-126631

A heap-based buffer overflow vulnerability in the Fireware OS authentication service allows an attacker who controls or intercepts traffic to the configured Active Directory server to create a denial of service condition and potentially execute arbitrary code by returning a specially crafted...

WatchGuard Fireware OS authorization issue vulnerability

Security vulnerabilities exist in WatchGuard Fireware OS versions from 2025.1 up to and including 2026.4, as well as versions from 12.0 up to and including 12.12.4 and from 12.0 up to and including 12.5.22. These vulnerabilities stem from the FireCluster synchronization daemon lacking...

WatchGuard Fireware OS path traversal vulnerability

Security vulnerabilities exist in WatchGuard Fireware OS versions from 2025.1 up to and including 2026.4, as well as versions from 12.0 up to and including 12.12.4 and from 12.0 up to and including 12.5.22. These vulnerabilities stem from a link-following issue in the firewall daemon. Local...

WatchGuard Fireware OS buffer error vulnerability

Buffer error vulnerabilities exist in WatchGuard Fireware OS versions from 2025.1 up to and including 2026.4, from version 12.0 up to and including 12.12.4, and from version 12.0 up to and including 12.5.22 on T15/T35 platforms. These vulnerabilities stem from a stack buffer overflow in the SIP...

PT-2026-126640

An external control of file path vulnerability in a WatchGuard Fireware OS firewall diagnostic command allows a remote, authenticated attacker with at least read-only Device Monitor privileges and access to the management CLI to create, truncate, or overwrite arbitrary files and modify kernel...