CVE-2026-20867

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

Local privilege escalation in Windows Management Services affects Windows Server 2019, Windows 11 24h2, and Windows Server 2025 through improper synchronization of shared resources, enabling authenticated users to gain elevated system privileges. The vulnerability exploits a race condition that an attacker can trigger without user interaction, though no patch is currently available.

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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-2026-20867 vulnerability details – vuln.today
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