Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.
Published: 2026-04-14
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Local privilege escalation
Action: Patch immediately
AI Analysis

Impact

The vulnerability is a race condition (CWE-362) in Windows Management Services caused by improper synchronization of a shared resource. Concurrent execution of conflicting operations can grant a local attacker temporary higher privileges, enabling the execution of code with system-level authority. This flaw allows a user who already has local access to trigger privileged actions that otherwise would be denied, leading to a full local privilege escalation.

Affected Systems

Affected operating systems include Microsoft Windows 10 (versions 1809, 21H2, 22H2), Windows 11 (versions 23H2, 24H2, 25H2, 22H3) and Windows Server 2019, 2022, 2025, and the 23H2 edition; both Desktop and Server Core installations are impacted. These build variants run on x86, x64, and arm64 architectures as specified by the CPE data.

Risk and Exploitability

The CVSS base score of 7.8 indicates high severity, and the exploit is considered to be local with no requirement for external network access. EPSS data is not available and the vulnerability is not listed in the CISA KEV catalog. The attack vector is likely local; an attacker who can initiate concurrent operations against Windows Management Services may trigger the race condition and elevate to system-level privileges, which can then be used to compromise the affected system.

Generated by OpenCVE AI on April 14, 2026 at 20:46 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the security update for CVE-2026-20930 as distributed by Microsoft via Windows Update or WSUS.
  • Ensure automatic updates are enabled or manually install the update to guarantee timely patching.
  • If the update is not yet available, consider upgrading to a later Windows release that contains the fix.
  • Restrict access to Windows Management Services by limiting account privileges to only those users that require it.
  • Verify the update installation by checking the Microsoft Security Update Guide or reviewing relevant event logs.

Generated by OpenCVE AI on April 14, 2026 at 20:46 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 24 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft windows Server 2022 23h2
CPEs cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
Vendors & Products Microsoft windows Server 2022 23h2

Wed, 15 Apr 2026 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 22h3
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows Server 2019 (server Core Installation)
Microsoft windows Server 2022, 23h2 Edition (server Core Installation)
Microsoft windows Server 2025 (server Core Installation)
Vendors & Products Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 22h3
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows Server 2019 (server Core Installation)
Microsoft windows Server 2022, 23h2 Edition (server Core Installation)
Microsoft windows Server 2025 (server Core Installation)

Tue, 14 Apr 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 14 Apr 2026 17:30:00 +0000

Type Values Removed Values Added
Description Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.
Title Windows Management Services Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft windows 10 1809
Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
Microsoft windows Server 23h2
Weaknesses CWE-362
CPEs cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows 10 1809
Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
Microsoft windows Server 23h2
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C'}


Subscriptions

Microsoft Windows 10 1809 Windows 10 21h2 Windows 10 21h2 Windows 10 22h2 Windows 10 22h2 Windows 11 22h3 Windows 11 23h2 Windows 11 23h2 Windows 11 24h2 Windows 11 24h2 Windows 11 25h2 Windows 11 25h2 Windows Server 2019 Windows Server 2019 (server Core Installation) Windows Server 2022 Windows Server 2022, 23h2 Edition (server Core Installation) Windows Server 2022 23h2 Windows Server 2025 Windows Server 2025 (server Core Installation) Windows Server 23h2
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-04-30T14:40:49.961Z

Reserved: 2025-12-04T20:04:16.336Z

Link: CVE-2026-20930

cve-icon Vulnrichment

Updated: 2026-04-14T17:57:14.946Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-14T18:16:43.393

Modified: 2026-04-24T20:10:25.150

Link: CVE-2026-20930

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-15T21:02:56Z

Weaknesses