---
id: "CVE-2026-111107"
kind: "vulnerability"
aliases: ["CVE-2026-111107"]
title: "WatchGuard Fireware OS: crafted login request crashes management interface"
severity: "high"
cvss: 8.7
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["firewall", "fireware-os", "infrastructure", "network-appliance", "watchguard"]
not_affected_if: ["management-restricted-to-trusted-network"]
published_at: "2026-10-27T16:17:29+00:00"
first_seen_at: "2026-10-27T16:33:07+00:00"
updated_at: "2026-10-27T16:34:06+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111107", "first_seen_at": "2026-10-27T16:33:07+00:00"}]
---

# WatchGuard Fireware OS: crafted login request crashes management interface

A NULL pointer dereference in the management interface of WatchGuard Fireware OS lets an unauthenticated remote attacker send a specially crafted login request that crashes the management service. Repeated exploitation ends all active administrator sessions and blocks management of the device, though traffic processing is not affected.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-27T16:33:07+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111107

## From the sources

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 sessions and in-progress management operations and can prevent management of the device. Traffic processing is not affected.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_