---
id: "CVE-2026-119974"
page: "https://infrastack.ai/live/CVE-2026-119974"
kind: "vulnerability"
aliases: ["CVE-2026-119974"]
title: "Windows Cloud Files Mini Filter Driver: race condition lets local users gain privileges"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows 10 1809 / Server 2019", "fixed": ["10.0.17763.9487"], "affected": ">= 10.0.17763.0, < 10.0.17763.9487", "ecosystem": "microsoft"}, {"name": "Windows 10 21H2", "fixed": ["10.0.19044.7846"], "affected": ">= 10.0.19044.0, < 10.0.19044.7846", "ecosystem": "microsoft"}, {"name": "Windows 10 22H2", "fixed": ["10.0.19045.7846"], "affected": ">= 10.0.19045.0, < 10.0.19045.7846", "ecosystem": "microsoft"}, {"name": "Windows Server 2022", "fixed": ["10.0.20348.5870"], "affected": ">= 10.0.20348.0, < 10.0.20348.5870", "ecosystem": "microsoft"}, {"name": "Windows 11 23H2", "fixed": ["10.0.22631.7711"], "affected": ">= 10.0.22631.0, < 10.0.22631.7711", "ecosystem": "microsoft"}, {"name": "Windows 11 24H2", "fixed": ["10.0.26100.9974"], "affected": ">= 10.0.26100.0, < 10.0.26100.9974", "ecosystem": "microsoft"}, {"name": "Windows 11 25H2", "fixed": ["10.0.26200.9974"], "affected": ">= 10.0.26200.0, < 10.0.26200.9974", "ecosystem": "microsoft"}, {"name": "Windows 11 26H2", "fixed": ["10.0.26300.9974"], "affected": ">= 10.0.26300.0, < 10.0.26300.9974", "ecosystem": "microsoft"}, {"name": "Windows 11 26H1", "fixed": ["10.0.28000.3501"], "affected": ">= 10.0.28000.0, < 10.0.28000.3501", "ecosystem": "microsoft"}, {"name": "Windows Server 2025", "fixed": ["10.0.26100.33822"], "affected": ">= 10.0.26100.0, < 10.0.26100.33822", "ecosystem": "microsoft"}]
ecosystems: []
tags: ["cloud-files", "infrastructure", "local-privilege-escalation", "windows", "windows-10", "windows-11", "windows-server"]
not_affected_if: ["no-local-untrusted-users", "patched-nov-2026"]
published_at: "2026-11-10T19:20:22+00:00"
first_seen_at: "2026-11-10T19:25:06+00:00"
updated_at: "2026-11-10T22:12:19+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119974", "first_seen_at": "2026-11-10T19:25:06+00:00"}, {"source": "analyst", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119974", "first_seen_at": "2026-11-10T22:12:19+00:00", "cites": ["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119974", "https://cveawg.mitre.org/api/cve/CVE-2026-119974"]}]
exploit_sources: []
---

# Windows Cloud Files Mini Filter Driver: race condition lets local users gain privileges

Link for people: https://infrastack.ai/live/CVE-2026-119974 (this .md is for agents)

A time-of-check time-of-use race condition in the Windows Cloud Files Mini Filter Driver lets an authorized local user elevate their privileges. An attacker who already has a local account can gain higher rights on the machine.

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

## Affected

- microsoft:Windows 10 1809 / Server 2019 affected >= 10.0.17763.0, < 10.0.17763.9487 fixed 10.0.17763.9487
- microsoft:Windows 10 21H2 affected >= 10.0.19044.0, < 10.0.19044.7846 fixed 10.0.19044.7846
- microsoft:Windows 10 22H2 affected >= 10.0.19045.0, < 10.0.19045.7846 fixed 10.0.19045.7846
- microsoft:Windows Server 2022 affected >= 10.0.20348.0, < 10.0.20348.5870 fixed 10.0.20348.5870
- microsoft:Windows 11 23H2 affected >= 10.0.22631.0, < 10.0.22631.7711 fixed 10.0.22631.7711
- microsoft:Windows 11 24H2 affected >= 10.0.26100.0, < 10.0.26100.9974 fixed 10.0.26100.9974
- microsoft:Windows 11 25H2 affected >= 10.0.26200.0, < 10.0.26200.9974 fixed 10.0.26200.9974
- microsoft:Windows 11 26H2 affected >= 10.0.26300.0, < 10.0.26300.9974 fixed 10.0.26300.9974
- microsoft:Windows 11 26H1 affected >= 10.0.28000.0, < 10.0.28000.3501 fixed 10.0.28000.3501
- microsoft:Windows Server 2025 affected >= 10.0.26100.0, < 10.0.26100.33822 fixed 10.0.26100.33822

## How to check

On each Windows host run 'cmd /c ver' or PowerShell '[System.Environment]::OSVersion.Version' (or winver) and compare the full build (e.g. 10.0.26100.xxxx) with the fixed builds in the fix field; lower means exposed. Prioritise shared hosts (RDP/terminal servers, VDI, build agents, CI runners) where untrusted users hold local accounts.

## Fix

Install the November 2026 Patch Tuesday cumulative update so the OS build is at least: Win10 1809 and Server 2019 10.0.17763.9487; Win10 21H2 10.0.19044.7846; Win10 22H2 10.0.19045.7846; Server 2022 10.0.20348.5870; Win11 23H2 10.0.22631.7711; Win11 24H2 10.0.26100.9974; Win11 25H2 10.0.26200.9974; Win11 26H2 10.0.26300.9974; Win11 26H1 10.0.28000.3501; Server 2025 10.0.26100.33822. KB numbers are listed in the MSRC entry.

## Timeline

- 2026-11-10T19:25:06+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119974
- 2026-11-10T22:12:19+00:00 analyst https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119974 — Read Microsoft's SUG data (MSRC API) and Microsoft CNA CVE record: fixed builds per Windows version, not exploited/not disclosed, Exploitation Less Likely. KB numbers not seen (MSRC page is JS-only); web-cli search worked, X not used (local-only, no conversation expected).

## Documents

- [advisory] MSRC: CVE-2026-119974 Windows Cloud Files Mini Filter Driver EoP https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119974
- [fix] CVE record CVE-2026-119974 (Microsoft CNA) https://cveawg.mitre.org/api/cve/CVE-2026-119974

## From the sources

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

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