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-2026-126626

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-2026-126633

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-2026-126628

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...

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...

Vulnerabilities in WatchGuard Fireware OS

WatchGuard has identified several vulnerabilities in the Fireware OS. The impact of these vulnerabilities varies, as does the access rights required for exploitation. – An attacker with write permissions to the system can exploit a vulnerability in SAML single sign-on sessions to load malicious...

CVE-2026-86134

A NULL pointer dereference vulnerability in the WatchGuard Fireware OS authentication process allows a remote, unauthenticated attacker to crash the management daemon by sending a specially request to the login interface, resulting in a denial of service...

CVE-2026-86134

A NULL pointer dereference vulnerability exists in the WatchGuard Fireware OS authentication process. This flaw allows a remote, unauthenticated attacker to crash the management daemon by sending a specially crafted request to the login interface , resulting in a denial of service (DoS). No speci...

EUVD-2026-89605

A NULL pointer dereference vulnerability in the WatchGuard Fireware OS authentication process allows a remote, unauthenticated attacker to crash the management daemon by sending a specially request to the login interface, resulting in a denial of service...

CVE-2026-86134 Fireware OS Pre-Authentication NULL Pointer Dereference Allows Remote Denial of Service

A NULL pointer dereference vulnerability in the WatchGuard Fireware OS authentication process allows a remote, unauthenticated attacker to crash the management daemon by sending a specially request to the login interface, resulting in a denial of service...

CVE-2026-86134 Fireware OS Pre-Authentication NULL Pointer Dereference Allows Remote Denial of Service

A NULL pointer dereference vulnerability in the WatchGuard Fireware OS authentication process allows a remote, unauthenticated attacker to crash the management daemon by sending a specially request to the login interface, resulting in a denial of service...

EUVD-2026-89489

A NULL pointer dereference vulnerability in Fireware OS's NetFlow packet-processing feature allows a remote, unauthenticated attacker to cause a denial of service by sending a specially crafted IPv6 packet...

EUVD-2026-89500

A stack-based buffer overflow vulnerability in the spamBlocker spamd service of WatchGuard Fireware OS allows an authenticated attacker with administrator privileges to crash the service or potentially execute arbitrary code by sending a specially crafted management request...

EUVD-2026-89495

An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon iked allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a specially crafted encrypted IKEv2 message, resulting in a denial of service...

EUVD-2026-89501

An uncontrolled resource consumption vulnerability in the Fireware OS login process wgagent allows a remote, unauthenticated attacker to cause a denial of service by sending a specially crafted request...

EUVD-2026-89492

An improper authorization vulnerability in Fireware OS's Access Portal reverse proxy allows an authenticated, low-privileged Access Portal user to access other web applications they are not authorized for by sending a specially crafted request for a different resource which they are authorized to...

EUVD-2026-89490

An integer underflow vulnerability in the WatchGuard Fireware OS IKEv2 daemon iked allows a remote, unauthenticated attacker to crash the process by sending a specially crafted encrypted IKEv2 message negotiated with an AES-GCM cipher suite...

EUVD-2026-89499

An improper authorization vulnerability in WatchGuard Fireware OS's SAML login process allows a remote, authenticated SAML user with access only to the Access Portal to obtain unauthorized Mobile VPN with SSL access through a specially crafted request...

EUVD-2026-89493

An uncontrolled resource consumption vulnerability in Fireware OS's diagnostic tasks feature allows a low-privileged, authenticated user to cause a denial of service of the system's diagnostic tools by repeatedly starting and aborting a specially crafted diagnostic task through the web UI...

EUVD-2026-89488

A stack-based buffer overflow vulnerability in WatchGuard Fireware OS's DHCP fingerprinting daemon fingerd allows an unauthenticated attacker with adjacent network access to execute arbitrary code or crash the process by sending a specially crafted DHCP packet...