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zdiAbdelhamid Naceri (halov)ZDI-21-1233
HistoryOct 27, 2021 - 12:00 a.m.

(0Day) Microsoft Windows Update Assistant Directory Junction Privilege Escalation Vulnerability

2021-10-2700:00:00
Abdelhamid Naceri (halov)
www.zerodayinitiative.com
6

0.0004 Low

EPSS

Percentile

9.8%

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within Windows Update Assistant. By creating a directory junction, an attacker can abuse Windows Update Assistant to delete a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of Administrator.

0.0004 Low

EPSS

Percentile

9.8%