CVE-2026-20857

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

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
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 7.8

Tags

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

Description

Untrusted pointer dereference in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

Analysis

Windows Cloud Files Mini Filter Driver contains an unsafe pointer dereference vulnerability that enables authenticated local users to achieve privilege escalation on affected Windows versions including Windows 10 1809, Windows 11, and Windows Server 2022. An attacker with valid credentials can exploit this flaw to gain elevated system privileges without user interaction. …

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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-2026-20857 vulnerability details – vuln.today
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