Nov 2026: Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
CVE-2026-119974 Published on November 10, 2026

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
Time-of-check time-of-use (toctou) race condition in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

Vendor Advisory NVD

Vulnerability Analysis

Exploitation:

NONE

Automatable:

Technical Impact:

TOTAL

Weakness Type

What is a TOCTTOU Vulnerability?

The software checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the software to perform invalid actions when the resource is in an unexpected state. This weakness can be security-relevant when an attacker can influence the state of the resource between check and use. This can happen with shared resources such as files, memory, or even variables in multithreaded programs.

CVE-2026-119974 has been classified to as a TOCTTOU vulnerability or weakness.

Products Associated with CVE-2026-119974

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Microsoft Windows 10

Microsoft Windows Server 2019

Microsoft Windows Server 2022

Microsoft Windows 11 23h2

Microsoft Windows 11 24h2

Microsoft Windows 11 25h2

Microsoft Windows 11 Version 26h2 Arm64 Based Systems

Microsoft Windows Server 2025

Microsoft Windows 11 26h1

Affected Versions

Microsoft Windows 10 Version 1809:

Version 10.0.17763.0 and below 10.0.17763.9487 is affected.

Microsoft Windows 10 Version 21H2:

Version 10.0.19044.0 and below 10.0.19044.7846 is affected.

Microsoft Windows 10 Version 22H2:

Version 10.0.19045.0 and below 10.0.19045.7846 is affected.

Microsoft Windows 11 version 23H2:

Version 10.0.22631.0 and below 10.0.22631.7711 is affected.

Microsoft Windows 11 Version 23H2:

Version 10.0.22631.0 and below 10.0.22631.7711 is affected.

Microsoft Windows 11 Version 24H2:

Version 10.0.26100.0 and below 10.0.26100.9974 is affected.

Microsoft Windows 11 Version 25H2:

Version 10.0.26200.0 and below 10.0.26200.9974 is affected.

Microsoft Windows 11 version 26H1:

Version 10.0.28000.0 and below 10.0.28000.3501 is affected.

Microsoft Windows 11 Version 26H2:

Version 10.0.26300.0 and below 10.0.26300.9974 is affected.

Microsoft Windows Server 2019:

Version 10.0.17763.0 and below 10.0.17763.9487 is affected.

Microsoft Windows Server 2019 (Server Core installation):

Version 10.0.17763.0 and below 10.0.17763.9487 is affected.

Microsoft Windows Server 2022:

Version 10.0.20348.0 and below 10.0.20348.5870 is affected.

Microsoft Windows Server 2025:

Version 10.0.26100.0 and below 10.0.26100.33822 is affected.

Microsoft Windows Server 2025 (Server Core installation):