CVE-2026-20861

HIGH
2026-01-13 [email protected]
7.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 13, 2026 - 18:16 nvd
HIGH 7.8

Tags

Windows Race Condition Windows Server 2022 Windows 10 22h2 Windows 10 1809 Windows Server 2025 Windows 11 25h2 Windows 10 21h2 Windows Server 2022 23h2 Windows 11 23h2 Windows 11 24h2 Windows Server 2019 Microsoft

Description

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

Analysis

Windows Management Services on Windows 10 and Windows Server 2022 contain a race condition in shared resource handling that permits authenticated local attackers to escalate privileges to system level. The vulnerability stems from improper synchronization during concurrent operations and affects multiple Windows versions including Windows 10 22H2 and 1809. …

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Remediation

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

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Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +39
POC: 0

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CVE-2026-20861 vulnerability details – vuln.today
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