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CVE-2026-69440— Windows MIDI Service Module Elevation of Privileges Vulnerability

Quick assessment

Affected
Microsoft Windows 11 Version 24H2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Windows 服务中的 MIDI 模块存在检查时与使用时（Toctou，Time-of-Check to Time-of-Use）竞态条件，允许经过身份验证的攻击者在本地提升权限。

CVSS 7.0 · High EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1548 · Abuse Elevation Control Mechanism

Affected Version Matrix 3

VendorProduct Version RangeStatus
Microsoft Windows 11 Version 24H2 10.0.26100.0< 10.0.26100.9445 affected
Microsoft Windows 11 Version 25H2 10.0.26200.0< 10.0.26200.9445 affected
Microsoft Windows 11 version 26H1 10.0.28000.0< 10.0.28000.2954 affected
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I. Basic Information for CVE-2026-69440

Vulnerability Information
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Vulnerability Title
Windows MIDI Service Module Elevation of Privileges Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Windows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.9445 -
Microsoft Windows 11 Version 25H2 10.0.26200.0 ~ 10.0.26200.9445 -
Microsoft Windows 11 version 26H1 10.0.28000.0 ~ 10.0.28000.2954 -

II. Public POCs for CVE-2026-69440

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III. Intelligence Information for CVE-2026-69440

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Vendor Advisories for CVE-2026-69440 (1)

Same Patch Batch · Microsoft · 2026-09-08 · 966 CVEs total

CVE-2026-83941 9.9 CRITICAL Entra ID Elevation of Privilege Vulnerability
CVE-2026-72979 9.8 CRITICAL Windows DHCP Server Remote Code Execution Vulnerability
CVE-2026-69595 9.8 CRITICAL Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
CVE-2026-69276 9.8 CRITICAL Microsoft UxTheme Library (uxtheme.dll) Remote Code Execution Vulnerability
CVE-2026-78445 9.8 CRITICAL Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
CVE-2026-73025 9.8 CRITICAL Windows iSCSI Security Feature Bypass Vulnerability
CVE-2026-73010 9.8 CRITICAL Microsoft Failover Cluster Remote Code Execution Vulnerability
CVE-2026-73009 9.8 CRITICAL Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability
CVE-2026-70296 9.8 CRITICAL Windows Imaging Component Remote Code Execution Vulnerability
CVE-2026-69590 9.8 CRITICAL Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
CVE-2026-69408 9.8 CRITICAL Microsoft Windows Media Foundation Remote Code Execution Vulnerability
CVE-2026-69910 9.8 CRITICAL Windows Hyper-V Remote Code Execution Vulnerability
CVE-2026-69769 9.8 CRITICAL Windows HTTP Print Provider Remote Code Execution Vulnerability
CVE-2026-69845 9.8 CRITICAL Windows DHCP Server Remote Code Execution Vulnerability
CVE-2026-69829 9.8 CRITICAL Windows Shell Remote Code Execution Vulnerability
CVE-2026-69824 9.8 CRITICAL Microsoft Standard XPS Remote Code Execution Vulnerability
CVE-2026-69431 9.8 CRITICAL Telnet Client Remote Code Execution Vulnerability
CVE-2026-69491 9.8 CRITICAL Microsoft DirectMusic Remote Code Execution Vulnerability
CVE-2026-69768 9.8 CRITICAL Windows RNDIS Remote Code Execution Vulnerability
CVE-2026-66302 9.8 CRITICAL Skype for Business Remote Code Execution Vulnerability

Showing top 20 of 966 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows 11 Version 24H2
Same vendor: Microsoft
Same weakness: CWE-367

V. Comments for CVE-2026-69440

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