CVE-2021-43893: Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability

Published Dec 15, 2021
·
Updated

Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability

Affected Software

39 affected components
Microsoft Windows 10
Microsoft Windows 10
Microsoft Windows 10=20h2
Microsoft Windows 10=20h2
Microsoft Windows 10=20h2
Microsoft Windows 10=21h1
Microsoft Windows 10=21h1
Microsoft Windows 10=21h1
Microsoft Windows 10=21h2
Microsoft Windows 10=21h2
Microsoft Windows 10=21h2
Microsoft Windows 10=1607
Microsoft Windows 10=1607
Microsoft Windows 10=1809
Microsoft Windows 10=1809
Microsoft Windows 10=1809
Microsoft Windows 10=1909
Microsoft Windows 10=1909
Microsoft Windows 10=1909
Microsoft Windows 10=2004
Microsoft Windows 10=2004
Microsoft Windows 10=2004
Microsoft Windows 11
Microsoft Windows 11
Microsoft Windows 7=sp1
Microsoft Windows 7=sp1
Microsoft Windows 8.1
Microsoft Windows 8.1
Microsoft Windows RT 8.1
Microsoft Windows Server=20h2
Microsoft Windows Server=2022
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2008=r2-sp2
Microsoft Windows Server 2008=r2-sp2
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016
Microsoft Windows Server 2016=2004
Microsoft Windows Server 2019

Remediation

Patch Available

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43893

Event History

Dec 15, 2021
CVE Published
via MITRE·02:15 PM
Data Sourced
via MITRE·02:15 PM
DescriptionSeverity
Data Sourced
via NVD·03:15 PM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2021-43893?

CVE-2021-43893 is rated as a critical elevation of privilege vulnerability.

2

How do I fix CVE-2021-43893?

To fix CVE-2021-43893, ensure your Microsoft Windows 10 or Windows Server installation is updated with the latest security patches and updates.

3

Which systems are affected by CVE-2021-43893?

CVE-2021-43893 affects multiple versions of Microsoft Windows 10, Windows 11, and Windows Server from 2008 to 2022.

4

What are the potential consequences of exploiting CVE-2021-43893?

Exploiting CVE-2021-43893 could allow an attacker to gain elevated privileges, potentially compromising system security.

5

Is there a workaround for CVE-2021-43893?

There is currently no effective workaround for CVE-2021-43893, so applying the security update is essential.

Company

Resources

Contact

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