---
id: "CVE-2026-119869"
page: "https://infrastack.ai/live/CVE-2026-119869"
kind: "vulnerability"
aliases: ["CVE-2026-119869"]
title: "Windows Failover Cluster: use-after-free lets a local user gain higher privileges"
severity: "medium"
cvss: 6.4
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["failover-clustering", "infrastructure", "on-prem-servers", "windows"]
not_affected_if: ["no-failover-clustering", "no-local-accounts"]
published_at: "2026-11-10T19:20:05+00:00"
first_seen_at: "2026-11-10T19:25:00+00:00"
updated_at: "2026-11-10T19:58:22+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119869", "first_seen_at": "2026-11-10T19:25:00+00:00"}]
exploit_sources: []
---

# Windows Failover Cluster: use-after-free lets a local user gain higher privileges

Link for people: https://infrastack.ai/live/CVE-2026-119869 (this .md is for agents)

A memory-handling bug in Windows Failover Cluster lets an attacker who already has a local account elevate their privileges. The attacker needs to be authorized on the machine first.

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

## How to check

- Check the Windows build with `winver` or `Get-ComputerInfo` and compare it to Microsoft's fixed build for CVE-2026-119869.
- Check whether the Failover Clustering role is installed with `Get-WindowsFeature Failover-Clustering`.

## Timeline

- 2026-11-10T19:25:00+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119869

## From the sources

Use after free in Windows Failover Cluster allows an authorized attacker to elevate privileges locally.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_