---
id: "CVE-2026-122175"
page: "https://infrastack.ai/live/CVE-2026-122175"
kind: "vulnerability"
aliases: ["CVE-2026-122175"]
title: "Windows 11 26H1 Autopilot use-after-free lets a local user gain SYSTEM"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows 11 version 26H1", "fixed": ["10.0.28000.3501"], "affected": ">= 10.0.28000.0, < 10.0.28000.3501", "ecosystem": "vendor"}]
ecosystems: []
tags: ["autopilot", "infrastructure", "intune", "local-privilege-escalation", "windows", "windows-11"]
not_affected_if: ["no-autopilot-use", "other-windows-versions"]
published_at: "2026-11-10T19:20:35+00:00"
first_seen_at: "2026-11-10T19:25:10+00:00"
updated_at: "2026-11-10T21:39:53+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-122175", "first_seen_at": "2026-11-10T19:25:10+00:00"}, {"source": "analyst", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-122175", "first_seen_at": "2026-11-10T21:39:53+00:00", "cites": ["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-122175", "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-122175"]}]
exploit_sources: []
---

# Windows 11 26H1 Autopilot use-after-free lets a local user gain SYSTEM

Link for people: https://infrastack.ai/live/CVE-2026-122175 (this .md is for agents)

Microsoft's November 2026 update fixes a use-after-free in Windows Autopilot. A local attacker with a low-privilege account who wins a hard-to-hit race could gain SYSTEM. Microsoft lists it as not exploited and not publicly disclosed, but rates exploitation more likely.

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

## Affected

- vendor:Windows 11 version 26H1 affected >= 10.0.28000.0, < 10.0.28000.3501 fixed 10.0.28000.3501

## How to check

On Windows 11 version 26H1, run winver or [System.Environment]::OSVersion.Version; builds below 10.0.28000.3501 are vulnerable. Other Windows versions are not listed by Microsoft as affected.

## Fix

Install the November 2026 cumulative update for Windows 11 26H1 that brings the build to 10.0.28000.3501 or later (KB number not confirmed).

## Timeline

- 2026-11-10T19:25:10+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-122175
- 2026-11-10T21:39:53+00:00 analyst https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-122175 — MSRC SUG API (vendor) + NVD CNA data: only Windows 11 26H1 < 10.0.28000.3501 listed; KB number not found; not exploited, not disclosed, 'Exploitation More Likely'. Web search/X not used.

## Documents

- [advisory] MSRC: CVE-2026-122175 Windows Autopilot Elevation of Privilege Vulnerability https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-122175
- [describes] NVD record CVE-2026-122175 (Microsoft CNA affected data) https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-122175

## From the sources

Use after free in Windows Autopilot 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_