CVE-2026-20869

HIGH
2026-01-13 [email protected]
7.0
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 13, 2026 - 18:16 nvd
HIGH 7.0

Tags

Windows Race Condition Windows 11 23h2 Windows Server 2012 Windows Server 2019 Windows Server 2008 Windows 10 22h2 Windows 11 24h2 Windows 11 25h2 Windows 10 1607 Windows Server 2016 Windows Server 2022 Windows 10 21h2 Windows 10 1809 Windows Server 2022 23h2 Windows Server 2025 Microsoft

Description

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

Analysis

Local privilege escalation in Windows Local Session Manager (LSM) across Windows 11 23h2, Windows Server 2012, and 2019 stems from improper synchronization in shared resource handling, enabling authenticated attackers to elevate privileges on affected systems. The vulnerability requires local access and specific timing conditions to exploit, with no patch 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

35
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +35
POC: 0

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CVE-2026-20869 vulnerability details – vuln.today
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