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Windows 10 Version 21H2 CVE-2026-58598

| EUVDEUVD-2026-45061 HIGH
Race Condition (CWE-362)
2026-07-16 microsoft GHSA-v83q-c28h-3q53
7.0
CVSS 3.1 · Vendor: microsoft
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Severity by source

Vendor (microsoft) PRIMARY
7.0 HIGH
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (microsoft) · only source for this CVE.

CVSS VectorVendor: microsoft

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jul 16, 2026 - 22:30 vuln.today
CVE Published
Jul 16, 2026 - 21:57 nvd
HIGH 7.0

DescriptionCVE.org

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

AnalysisAI

Local privilege escalation in the Windows Backup Engine affects Windows 10 (21H2, 22H2) and Windows 11 (24H2, 25H2, 26H1), where a race condition (CWE-362) lets an already-authenticated low-privileged user win a timing window to elevate to higher privileges. The CVSS 3.1 base score is 7.0 (AV:L/AC:H/PR:L), reflecting local access and high attack complexity but full confidentiality, integrity, and availability impact. No public exploit identified at time of analysis and the CVE is not listed in CISA KEV; a vendor patch is available from Microsoft.

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CVE-2026-58598 vulnerability details – vuln.today

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