---
id: CVE-2026-69440
title: >-
  Time-of-check time-of-use (toctou) race condition in Windows MIDI Service
  Module allows an authorized attacker to elevate privileges locally.
summary: >-
  Time-of-check time-of-use (toctou) race condition in Windows MIDI Service
  Module allows an authorized attacker to elevate privileges locally.
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-367
vendor: Microsoft
product: Windows 11 Version 24H2
affected:
  - windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9445
  - windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9445
  - windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2954
published: '2026-09-08'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T10:18:31.840'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-69440'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69440'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-09T04:22:17.595693Z'
ingestedAt: '2026-09-08T19:08:49.612Z'
epss: 0.00207
epssPercentile: 0.11165
---

## Overview

Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.