CVE-2026-21508

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

Description

Improper authentication in Windows Storage allows an authorized attacker to elevate privileges locally.

Analysis

Windows Storage component contains an authentication bypass that enables authenticated local users to escalate privileges on Windows 10, Windows 11, and Windows Server 2016/2019 systems. An attacker with valid local credentials can exploit this vulnerability to gain elevated system access without user interaction. …

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Remediation

Within 24 hours: Inventory all Windows systems running affected Storage components and assess user access patterns. Within 7 days: Implement access controls to restrict local administrative capabilities and review privileged account usage logs for suspicious activity. …

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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-2026-21508 vulnerability details – vuln.today
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