---
id: "CVE-2026-119945"
page: "https://infrastack.ai/live/CVE-2026-119945"
kind: "vulnerability"
aliases: ["CVE-2026-119945"]
title: "Windows MDM: use-after-free lets an unauthorized attacker run code remotely"
severity: "high"
cvss: 8.1
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows 10 21H2", "fixed": ["10.0.19044.7846"], "affected": "< 10.0.19044.7846", "ecosystem": "microsoft"}, {"name": "Windows 10 22H2", "fixed": ["10.0.19045.7846"], "affected": "< 10.0.19045.7846", "ecosystem": "microsoft"}, {"name": "Windows 11 23H2", "fixed": ["10.0.22631.7711"], "affected": "< 10.0.22631.7711", "ecosystem": "microsoft"}, {"name": "Windows 11 24H2", "fixed": ["10.0.26100.9974"], "affected": "< 10.0.26100.9974", "ecosystem": "microsoft"}, {"name": "Windows 11 25H2", "fixed": ["10.0.26200.9974"], "affected": "< 10.0.26200.9974", "ecosystem": "microsoft"}, {"name": "Windows 11 26H1", "fixed": ["10.0.28000.3501"], "affected": "< 10.0.28000.3501", "ecosystem": "microsoft"}, {"name": "Windows 11 26H2", "fixed": ["10.0.26300.9974"], "affected": "< 10.0.26300.9974", "ecosystem": "microsoft"}, {"name": "Windows Server 2022", "fixed": ["10.0.20348.5870"], "affected": "< 10.0.20348.5870", "ecosystem": "microsoft"}, {"name": "Windows Server 2025", "fixed": ["10.0.26100.33822"], "affected": "< 10.0.26100.33822", "ecosystem": "microsoft"}]
ecosystems: []
tags: ["infrastructure", "intune", "mdm", "windows", "windows-10", "windows-11", "windows-server"]
not_affected_if: []
published_at: "2026-11-10T19:20:17+00:00"
first_seen_at: "2026-11-10T19:25:04+00:00"
updated_at: "2026-11-10T22:17:50+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119945", "first_seen_at": "2026-11-10T19:25:04+00:00"}, {"source": "analyst", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119945", "first_seen_at": "2026-11-10T22:17:50+00:00", "cites": ["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119945", "https://app.opencve.io/cve/CVE-2026-119945"]}]
exploit_sources: []
---

# Windows MDM: use-after-free lets an unauthorized attacker run code remotely

Link for people: https://infrastack.ai/live/CVE-2026-119945 (this .md is for agents)

Windows Modern Device Management has a use-after-free memory flaw that lets an unauthorized attacker reach it over the network. A successful attack lets the attacker execute code on the affected Windows machine.

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

## Affected

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

## How to check

Run winver or [System.Environment]::OSVersion / (Get-ComputerInfo).OsBuildNumber plus UBR (HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion, CurrentBuild.UBR) and compare with the fixed build for your release. Below the fixed build means unpatched.

## Fix

Install the November 2026 Windows cumulative update (released 2026-11-10) so the build reaches at least: Win10 21H2/22H2 10.0.19044.7846 / 10.0.19045.7846; Win11 23H2 10.0.22631.7711; Win11 24H2/25H2/26H2 10.0.26100.9974 / 10.0.26200.9974 / 10.0.26300.9974; Win11 26H1 10.0.28000.3501; Server 2022 10.0.20348.5870; Server 2025 10.0.26100.33822.

## Timeline

- 2026-11-10T19:25:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119945
- 2026-11-10T22:17:50+00:00 analyst https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119945 — MSRC page is JS-only and unreadable; versions come from the CVE List V5 data (via OpenCVE) from the Microsoft CNA. Nothing marked verified. No exploitation or PoC reported (vector E:U). Re-check on MSRC for enrollment conditions.

## Documents

- [advisory] MSRC Security Update Guide: CVE-2026-119945 (JS-only, text not readable) https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119945
- [describes] OpenCVE: CVE-2026-119945 (CVE List V5 data from Microsoft CNA) https://app.opencve.io/cve/CVE-2026-119945

## From the sources

Use after free in Windows Modern Device Management (MDM) allows an unauthorized attacker to execute code over a network.

---

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