---
id: CVE-2021-34513
title: Windows Storage Spaces Controller Elevation of Privilege Vulnerability
summary: Windows Storage Spaces Controller Elevation of Privilege Vulnerability
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-190
vendor: microsoft
product: windows_10
affected:
  - windows_10
  - windows_10 = 20h2
  - windows_10 = 21h1
  - windows_10 = 1909
  - windows_10 = 2004
  - windows_server_2016 = 20h2
  - windows_server_2016 = 2004
published: '2021-07-14'
updated: '2026-08-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-34513'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34513'
    label: secure@microsoft.com
  - url: >-
      https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34513
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.zerodayinitiative.com/advisories/ZDI-21-875/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.01049
epssPercentile: 0.62715
zeroDay: true
ingestedAt: '2026-08-10T16:41:17.222Z'
---

## Overview

Windows Storage Spaces Controller Elevation of Privilege Vulnerability

## Affected

- `windows_10`
- `windows_10 = 20h2`
- `windows_10 = 21h1`
- `windows_10 = 1909`
- `windows_10 = 2004`
- `windows_server_2016 = 20h2`
- `windows_server_2016 = 2004`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.