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A missing authentication vulnerability in the FireCluster Sync processing allows an attacker positioned on the cluster interconnect, such as a compromised cluster peer or an on-path network attacker, to invoke privileged firewall management actions as root by sending a specially crafted request.

Excerpt language: en.

Severity high: primary CNA CVSS 8.7 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:29.859Z. Updated 2026-10-29T10:45:46.468Z.

An out-of-bounds read vulnerability in the FireCluster Sync processing allows an attacker positioned on the cluster interconnect, such as a compromised cluster peer or an on-path network attacker, to repeatedly crash the firewall's cluster synchronization process by sending specially crafted network traffic, resulting …

Excerpt language: en. Shortened to 320 code points; full text retained locally.

Severity high: primary CNA CVSS 7.2 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:28.633Z. Updated 2026-10-29T01:52:05.734Z.

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 response.

Excerpt language: en.

Severity critical: primary CNA CVSS 9.2 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:28.465Z. Updated 2026-10-27T15:52:28.465Z.

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 parameters with root pri…

Excerpt language: en. Shortened to 320 code points; full text retained locally.

Severity high: primary CNA CVSS 7.2 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:28.267Z. Updated 2026-10-27T15:52:28.267Z.

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.

Excerpt language: en.

Severity critical: primary CNA CVSS 9.1 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:28.244Z. Updated 2026-10-29T10:45:46.609Z.

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.

Excerpt language: en.

Severity medium: primary CNA CVSS 6.1 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:28.229Z. Updated 2026-10-27T15:52:28.229Z.

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.

Excerpt language: en.

Severity high: primary CNA CVSS 8.7 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:28.182Z. Updated 2026-10-27T15:52:28.182Z.

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.

Excerpt language: en.

Severity high: primary CNA CVSS 8.6 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:28.165Z. Updated 2026-10-27T15:52:28.165Z.

A heap-based buffer overflow vulnerability exists 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 response.

Excerpt language: en.

Severity critical: primary CNA CVSS 9.2 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:28.053Z. Updated 2026-10-27T15:52:28.053Z.

An improper authentication vulnerability in WatchGuard Fireware OS's AuthPoint multi-factor authentication process allows a local, unauthenticated attacker on the appliance to hijack another user's in-progress MFA session by supplying a specially crafted request and convincing the victim user to accept an MFA push noti…

Excerpt language: en. Shortened to 320 code points; full text retained locally.

Severity medium: primary CNA CVSS 5.6 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:27.999Z. Updated 2026-10-27T15:52:27.999Z.

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.

Excerpt language: en.

Severity critical: primary CNA CVSS 9.2 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:27.970Z. Updated 2026-10-29T10:45:46.751Z.

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.

Excerpt language: en.

Severity critical: primary CNA CVSS 9.2 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:27.871Z. Updated 2026-10-27T15:52:27.871Z.

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 triggering a list update. Wri…

Excerpt language: en. Shortened to 320 code points; full text retained locally.

Severity high: primary CNA CVSS 7.1 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:27.765Z. Updated 2026-10-29T10:45:46.897Z.

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 tampering with a FireCloud G…

Excerpt language: en. Shortened to 320 code points; full text retained locally.

Severity critical: primary CNA CVSS 9.5 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:27.758Z. Updated 2026-10-27T15:52:27.758Z.

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.

Excerpt language: en.

Severity medium: primary CNA CVSS 6 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:27.697Z. Updated 2026-10-27T15:52:27.697Z.

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 active administrator sess…

Excerpt language: en. Shortened to 320 code points; full text retained locally.

Severity high: primary CNA CVSS 8.7 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:27.690Z. Updated 2026-10-27T15:52:27.690Z.

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 enabled.

Excerpt language: en.

Severity critical: primary CNA CVSS 9.2 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:52:27.668Z. Updated 2026-10-29T10:45:47.040Z.

An attacker can read the name of filesystem paths of your application present via Tidewave configuration via /tidewave/connect or via the rendered toolbar. Neither response checks the Host header. A web page that rebinds its own domain to the loopback address can therefore read the tag with a same-origin request, whic…

Excerpt language: en. Shortened to 320 code points; full text retained locally.

Severity low: primary CNA CVSS 2.3 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.

Published 2026-10-27T15:47:36.862Z. Updated 2026-10-27T15:47:36.862Z.