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zdiAbdelhamid Naceri (halov)ZDI-21-1053
HistorySep 02, 2021 - 12:00 a.m.

Microsoft Windows Lock Screen Improper Access Control Authentication Bypass Vulnerability

2021-09-0200:00:00
Abdelhamid Naceri (halov)
www.zerodayinitiative.com
10

0.001 Low

EPSS

Percentile

21.6%

This vulnerability allows physically present attackers to bypass authentication on affected installations of Microsoft Windows. Authentication is not required to exploit this vulnerability. The specific flaw exists within the lock screen. The issue results from the lack of proper access control prior to authentication. An attacker can leverage this vulnerability to bypass authentication on the system.