---
id: "CVE-2026-112763"
page: "https://infrastack.ai/live/CVE-2026-112763"
kind: "vulnerability"
aliases: ["CVE-2026-112763"]
title: "Windows: Cloud Files driver use-after-free lets a local user gain higher privileges"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows 10 1809 / Windows Server 2019", "fixed": ["10.0.17763.9487"], "affected": "< 10.0.17763.9487", "ecosystem": "vendor"}, {"name": "Windows 10 21H2", "fixed": ["10.0.19044.7846"], "affected": "< 10.0.19044.7846", "ecosystem": "vendor"}, {"name": "Windows 10 22H2", "fixed": ["10.0.19045.7846"], "affected": "< 10.0.19045.7846", "ecosystem": "vendor"}, {"name": "Windows 11 23H2", "fixed": ["10.0.22631.7711"], "affected": "< 10.0.22631.7711", "ecosystem": "vendor"}, {"name": "Windows 11 24H2", "fixed": ["10.0.26100.9974"], "affected": "< 10.0.26100.9974", "ecosystem": "vendor"}, {"name": "Windows 11 25H2", "fixed": ["10.0.26200.9974"], "affected": "< 10.0.26200.9974", "ecosystem": "vendor"}, {"name": "Windows 11 26H1", "fixed": ["10.0.28000.3501"], "affected": "< 10.0.28000.3501", "ecosystem": "vendor"}, {"name": "Windows 11 26H2", "fixed": ["10.0.26300.9974"], "affected": "< 10.0.26300.9974", "ecosystem": "vendor"}, {"name": "Windows Server 2022", "fixed": ["10.0.20348.5870"], "affected": "< 10.0.20348.5870", "ecosystem": "vendor"}, {"name": "Windows Server 2025", "fixed": ["10.0.26100.33822"], "affected": "< 10.0.26100.33822", "ecosystem": "vendor"}]
ecosystems: []
tags: ["cloud-files", "endpoints", "infrastructure", "local-privilege-escalation", "onedrive", "windows", "windows-server"]
not_affected_if: ["no-local-untrusted-users", "non-windows"]
published_at: "2026-11-10T19:18:39+00:00"
first_seen_at: "2026-11-10T19:24:32+00:00"
updated_at: "2026-11-11T00:11:43+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112763", "first_seen_at": "2026-11-10T19:24:32+00:00"}, {"source": "analyst", "url": "https://nvd.nist.gov/vuln/detail/cve-2026-112763", "first_seen_at": "2026-11-11T00:11:43+00:00", "cites": ["https://nvd.nist.gov/vuln/detail/cve-2026-112763", "https://www.rapid7.com/blog/post/patch-tuesday-november-2026-em/"]}]
exploit_sources: []
---

# Windows: Cloud Files driver use-after-free lets a local user gain higher privileges

Link for people: https://infrastack.ai/live/CVE-2026-112763 (this .md is for agents)

A memory-handling bug in the Windows Cloud Files Mini Filter Driver lets a logged-in user corrupt memory and elevate their privileges on the same machine. An attacker needs a local account and can then act with system-level rights.

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

## Affected

- vendor:Windows 10 1809 / Windows Server 2019 affected < 10.0.17763.9487 fixed 10.0.17763.9487
- vendor:Windows 10 21H2 affected < 10.0.19044.7846 fixed 10.0.19044.7846
- vendor:Windows 10 22H2 affected < 10.0.19045.7846 fixed 10.0.19045.7846
- vendor:Windows 11 23H2 affected < 10.0.22631.7711 fixed 10.0.22631.7711
- vendor:Windows 11 24H2 affected < 10.0.26100.9974 fixed 10.0.26100.9974
- vendor:Windows 11 25H2 affected < 10.0.26200.9974 fixed 10.0.26200.9974
- vendor:Windows 11 26H1 affected < 10.0.28000.3501 fixed 10.0.28000.3501
- vendor:Windows 11 26H2 affected < 10.0.26300.9974 fixed 10.0.26300.9974
- vendor:Windows Server 2022 affected < 10.0.20348.5870 fixed 10.0.20348.5870
- vendor:Windows Server 2025 affected < 10.0.26100.33822 fixed 10.0.26100.33822

## How to check

Run winver (or [Environment]::OSVersion / cmd 'ver') and compare the full build number (e.g. 10.0.26100.xxxx) to the fixed build for your Windows version; below the fixed build means exposed. Servers that do not use OneDrive Files On-Demand or other cloud sync still have the driver (CldFlt) loaded; check with 'fltmc filters'.

## Fix

Install the November 2026 Windows cumulative update; fixed builds per Microsoft CNA data: Win10 1809/Server 2019 10.0.17763.9487, Win10 21H2 10.0.19044.7846, Win10 22H2 10.0.19045.7846, Win11 23H2 10.0.22631.7711, Win11 24H2 10.0.26100.9974, Win11 25H2 10.0.26200.9974, Win11 26H1 10.0.28000.3501, Win11 26H2 10.0.26300.9974, Server 2022 10.0.20348.5870, Server 2025 10.0.26100.33822

## Timeline

- 2026-11-10T19:24:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112763
- 2026-11-11T00:11:43+00:00 analyst https://nvd.nist.gov/vuln/detail/cve-2026-112763 — MSRC guide page not readable (JS-only); affected builds/fixed builds taken from Microsoft CNA data as mirrored in NVD/nmmapper. Rapid7: Exploitation Unlikely, not exploited/public. Nothing marked verified (no Microsoft page read directly).

## Documents

- [describes] NVD CVE-2026-112763 (CNA data from Microsoft) https://nvd.nist.gov/vuln/detail/cve-2026-112763
- [mentions] Rapid7 Patch Tuesday November 2026 https://www.rapid7.com/blog/post/patch-tuesday-november-2026-em/

## From the sources

Use after free in Windows Cloud Files Mini Filter Driver 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_