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CVE-2026-18145

Fireware OS Stack-based Buffer Overflow in spamd Allows Remote Code Execution

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.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Fireware Os
CVE-2026-86101

Fireware OS Authorization Bypass in SAML Login Allows Unauthorized SSLVPN Access

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.

CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Fireware Os
CVE-2026-86104

Fireware OS Resource Exhaustion in Login Process Allows Denial of Service

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.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Fireware Os
CVE-2026-86105

Fireware OS Improper Authorization in Access Portal Reverse Proxy

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 access.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Fireware Os
CVE-2026-86128

Fireware OS NULL Pointer Dereference in NetFlow IPv6 Traffic Processing Allows Remote Denial of Service

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.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Fireware Os
CVE-2026-86131

Fireware OS Code Injection in BOVPN Over TLS Client Allows Remote Code Execution

A code injection vulnerability in WatchGuard Fireware OS's BOVPN Over TLS client configuration handling allows an attacker who controls the remote VPN server to execute arbitrary commands as root on the connecting Firebox.

CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Fireware Os
CVE-2026-86132

Fireware OS Pre-Authentication Integer Underflow in iked Allows Denial of Service

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.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Fireware Os
CVE-2026-86133

Fireware OS Pre-Authentication Integer Underflow in iked Allows Remote Denial of Service

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.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Fireware Os
CVE-2026-86136

Fireware OS Missing Authorization in wgagent Management API Allows Denial of Service - Variant A

A missing authorization vulnerability in the wgagent management daemon's session initialization function allows an authenticated, low-privileged user (including a read-only or guest administrator account) to crash the wgagent process and read arbitrary files accessible to the daemon by submitting a specially crafted management API request.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Fireware Os
CVE-2026-90441

Fireware OS Missing Authorization in wgagent Management API Allows Denial of Service - Variant B

A missing authorization vulnerability in the wgagent management daemon's session initialization function allows an authenticated, low-privileged user (including a read-only or guest administrator account) to crash the wgagent process and read arbitrary files accessible to the daemon by submitting a specially crafted management API request.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Fireware Os
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.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Fireware Os
CVE-2026-81433

Fireware OS Pre-Authentication Stack Buffer Overflow in fingerd Allows Remote Code Execution

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.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Os
CVE-2026-19315

Fireware OS Pre-Authentication Type Confusion in iked Allows Remote Code Execution

A type confusion vulnerability in the iked process of WatchGuard Fireware OS allows a remote unauthenticated attacker to execute arbitrary code by sending specially crafted network traffic.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Os
CVE-2026-78008

Fireware OS Authenticated Buffer Overflow in wgagent

A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Os
CVE-2026-19317

Fireware OS Pre-Authentication Out-of-Bounds Read in iked Allows Denial of Service (DoS)

An out-of-bounds read vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Os
CVE-2026-13086

Fireware OS Stack-Based Buffer Overflow in Mobile Security epm Endpoint

A stack-based buffer overflow in the epm (Endpoint Protection Manager) service used by the deprecated Mobile Security feature in WatchGuard Fireware OS allows an unauthenticated remote attacker to execute arbitrary code.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Os
CVE-2026-78010

Fireware OS Stack-Based Buffer Overflow in iked Allows Unauthenticated Denial of Service

A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process iallows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Os
CVE-2026-78011

Fireware OS Integer Underflow in Iked Allows Unauthenticated Denial of Service (DoS)

An integer underflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Os
CVE-2026-19318

Fireware OS Pre-Authentication Stack Buffer Overflow in iked Allows Remote Code Execution

A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to execute arbitrary code by sending specially crafted network traffic.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Os
CVE-2026-19314

Fireware OS Integer Underflow in iked Allows Unauthenticated Denial of Service (DoS)

An integer underflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Watchguard
Products
Fireware Os