CVE-2026-21234

HIGH
2026-02-10 [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 - 22:02 vuln.today
CVE Published
Feb 10, 2026 - 18:16 nvd
HIGH 7.0

Tags

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

Description

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

Analysis

Local privilege escalation in Windows Connected Devices Platform Service exploits a race condition in resource synchronization, allowing authenticated attackers to gain elevated privileges on affected Windows systems including Server 2022, Windows 11 25h2, and Windows 10 21h2. The vulnerability requires local access and user interaction is not needed, making it a practical attack vector for users with standard privileges. …

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Remediation

Within 24 hours: Inventory all Windows systems running Connected Devices Platform Service and assess user access levels. Within 7 days: Implement network segmentation to restrict local access for non-administrative users and disable Connected Devices Platform Service where operationally feasible. …

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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-2026-21234 vulnerability details – vuln.today
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