Incorrect Privilege Assignment in Windows Hello Enables Local Tampering

Publication date: 2026-01-13

Last updated on: 2026-01-13

Assigner: Microsoft Corporation

Description

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

CVSS Scores

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Meta Information

Published

2026-01-13

Last Modified

2026-01-13

Generated

2026-07-06

AI Q&A

2026-01-14

EPSS Evaluated

2026-07-05

NVD

CVE-2026-20804

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_hello	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-266	A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.

Attack-Flow Graph

Executive Summary

This vulnerability involves incorrect privilege assignment in Windows Hello, which allows an unauthorized attacker to perform tampering on the system locally. [1]

Impact Analysis

The vulnerability can impact you by allowing an unauthorized attacker to tamper with your system locally, potentially compromising the integrity of your Windows Hello authentication. [1]

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