Description
Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.
Published: 2026-01-13
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Local Privilege Escalation
Action: Patch Immediately
AI Analysis

Impact

The vulnerability is a use‑after‑free condition in the Windows Management Services that permits an attacker with local authorization to gain elevated, local privileges. Because the fault occurs after a resource has been freed, an attacker could craft input that causes the service to execute code under a higher privilege context. The issue is classified under CWE‑416 (Use After Free) and CWE‑362 (Race Condition).

Affected Systems

Microsoft Windows 10 version 1809, 21H2, and 22H2; Microsoft Windows 11 versions 22H3, 23H2, 24H2, and 25H2; Microsoft Windows Server 2019, 2022, and 2025, including Server Core installations for 2019, 2022, and 2025.

Risk and Exploitability

This flaw carries a CVSS score of 7.8, indicating a high severity risk. The EPSS score is below 1%, suggesting a very low probability of exploitation at this time, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The attack vector is inferred to be local; an adversary must first authenticate on the affected system and then exploit the Windows Management Services. The use‑after‑free can grant arbitrary code execution at local level, enabling unrestricted control over the machine.

Generated by OpenCVE AI on April 16, 2026 at 08:20 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Install the security update referenced in the Microsoft Security Update Guide for the affected Windows 10, Windows 11, and Windows Server releases.
  • Limit local use of Windows Management Services by restricting account permissions and disabling services on systems that do not require them.
  • Monitor for unexpected privilege elevation or anomalous usage of Windows Management Services to detect potential exploitation attempts.

Generated by OpenCVE AI on April 16, 2026 at 08:20 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 16 Jan 2026 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows Server 2022 23h2
CPEs cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
Vendors & Products Microsoft windows 10 21h2
Microsoft windows 10 22h2
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows Server 2022 23h2

Wed, 14 Jan 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 13 Jan 2026 18:15:00 +0000

Type Values Removed Values Added
Description Use after free 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
CWE-416
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 23h2 Windows 11 23h2 Windows 11 24h2 Windows 11 24h2 Windows 11 25h2 Windows 11 25h2 Windows Server 2019 Windows Server 2022 Windows Server 2022 23h2 Windows Server 2025 Windows Server 23h2
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-04-01T13:48:50.369Z

Reserved: 2025-12-04T20:04:16.335Z

Link: CVE-2026-20924

cve-icon Vulnrichment

Updated: 2026-01-13T19:33:45.746Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-13T18:16:19.027

Modified: 2026-01-16T14:37:34.167

Link: CVE-2026-20924

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-16T08:30:29Z

Weaknesses