PT-2026-2657 · Microsoft · Windows

Published 2026-01-13 · Updated 2026-01-17 · CVE-2026-20804

Positive Technologies · (AI Summary)

CVSS v3.1

7.7

7.7

High

Base vector

AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions Windows (affected versions not specified)

Description A flaw in Windows Hello’s privilege assignment can allow an attacker to perform tampering locally. This issue allows attackers to affect the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Incorrect Privilege Assignment

Weakness Enumeration

CWE-266

Related Identifiers

BDU:2026-00479

CVE-2026-20804

Affected Products

Windows

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-20804 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20804 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20804 · Security Note
• https://bdu.fstec.ru/vul/2026-00479 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20804 · Vendor Advisory
• https://cybersecurity-help.cz/vdb/SB2026011422 · Note
• https://twitter.com/CVEnew/status/2012669658760192308 · Twitter Post
• https://dbugs.ptsecurity.com/vulnerability/PT-2026-2657 · Note