---
id: CVE-2026-58598
title: >-
  Concurrent execution using shared resource with improper synchronization
  ('race condition') in Windows Backup Engine allows an authorized attacker to
  elevate privileges locally.
summary: >-
  Concurrent execution using shared resource with improper synchronization
  ('race condition') in Windows Backup Engine allows an authorized attacker to
  elevate privileges locally.
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-362
  - CWE-416
published: '2026-07-16'
updated: '2026-07-18'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-58598'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58598'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.00202
epssPercentile: 0.08946
ingestedAt: '2026-07-18T20:24:54.753Z'
vendor: Microsoft
product: Windows 10 Version 21H2
affected:
  - windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7548
  - windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7548
  - windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8875
  - windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8875
  - windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2525
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-07-17T00:00:00+00:00'
---

## Overview

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

## Remediation

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