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CVE-2026-20852

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CVE-2026-20852

Published: Jan 13, 2026

Modified: Apr 1, 2026

PUBLISHED

CVSS v3.1

7.7

HIGH

Description

Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.

VendorProductVersions

Microsoft

Windows 10 Version 1607

affected
10.0.14393.0 - < 10.0.14393.8783

Microsoft

Windows 10 Version 1809

affected
10.0.17763.0 - < 10.0.17763.8276

Microsoft

Windows 10 Version 21H2

affected
10.0.19044.0 - < 10.0.19044.6809

Microsoft

Windows 10 Version 22H2

affected
10.0.19045.0 - < 10.0.19045.6809

Microsoft

Windows 11 version 22H3

affected
10.0.22631.0 - < 10.0.22631.6491

Microsoft

Windows 11 Version 23H2

affected
10.0.22631.0 - < 10.0.22631.6491

Microsoft

Windows 11 Version 24H2

affected
10.0.26100.0 - < 10.0.26100.7623

Microsoft

Windows 11 Version 25H2

affected
10.0.26200.0 - < 10.0.26200.7623

Microsoft

Windows Server 2016

affected
10.0.14393.0 - < 10.0.14393.8783

Microsoft

Windows Server 2016 (Server Core installation)

affected
10.0.14393.0 - < 10.0.14393.8783

Microsoft

Windows Server 2019

affected
10.0.17763.0 - < 10.0.17763.8276

Microsoft

Windows Server 2019 (Server Core installation)

affected
10.0.17763.0 - < 10.0.17763.8276

Microsoft

Windows Server 2022

affected
10.0.20348.0 - < 10.0.20348.4648

Microsoft

Windows Server 2022, 23H2 Edition (Server Core installation)

affected
10.0.25398.0 - < 10.0.25398.2092

Microsoft

Windows Server 2025

affected
10.0.26100.0 - < 10.0.26100.32230

Microsoft

Windows Server 2025 (Server Core installation)

affected
10.0.26100.0 - < 10.0.26100.32230

Weaknesses (CWE)

CWE-266

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

References

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