4.6
CVSSv2

CVE-2021-26889

Published: 11/03/2021 Updated: 29/12/2023
CVSS v2 Base Score: 4.6 | Impact Score: 6.4 | Exploitability Score: 3.9
CVSS v3 Base Score: 7.8 | Impact Score: 5.9 | Exploitability Score: 1.8
VMScore: 409
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Vulnerability Summary

This vulnerability allows local malicious users 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 Setup. By creating a directory junction, an attacker can abuse Windows Setup to create a file in an arbitrary location. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of SYSTEM.

Vulnerability Trend

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microsoft windows 10 1803

microsoft windows server 2019 -

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microsoft windows server 2016 1909

microsoft windows 10 1909

microsoft windows 10 2004

microsoft windows server 2016 2004

microsoft windows 10 20h2

microsoft windows server 2016 20h2