CVE-2021-43893: Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
First published: Wed Dec 15 2021(Updated: )
Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
Credit: secure@microsoft.com secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| 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 | ||
| Microsoft Windows Server | =20h2 | |
| Microsoft Windows Server | =2022 | |
| Microsoft Windows Server 2008 Itanium | =r2-sp1 | |
| Microsoft Windows Server 2008 Itanium | =r2-sp2 | |
| Microsoft Windows Server 2008 Itanium | =r2-sp2 | |
| Microsoft Windows Server 2012 x64 | ||
| Microsoft Windows Server 2012 x64 | =r2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | =2004 | |
| Microsoft Windows Server 2019 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-43893?
CVE-2021-43893 is rated as a critical elevation of privilege vulnerability.
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.
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.
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.
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.
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- agent/softwarecombine
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- collector/nvd-index
- vendor/microsoft
- canonical/microsoft windows 10
- version/microsoft windows 10/20h2
- version/microsoft windows 10/21h1
- version/microsoft windows 10/21h2
- version/microsoft windows 10/1607
- version/microsoft windows 10/1809
- version/microsoft windows 10/1909
- version/microsoft windows 10/2004
- canonical/microsoft windows 11
- canonical/microsoft windows 7
- version/microsoft windows 7/sp1
- canonical/microsoft windows 8.1
- canonical/microsoft windows rt
- canonical/microsoft windows server
- version/microsoft windows server/20h2
- version/microsoft windows server/2022
- canonical/microsoft windows server 2008 itanium
- version/microsoft windows server 2008 itanium/r2-sp1
- version/microsoft windows server 2008 itanium/r2-sp2
- canonical/microsoft windows server 2012 x64
- version/microsoft windows server 2012 x64/r2
- canonical/microsoft windows server 2016
- version/microsoft windows server 2016/2004
- canonical/microsoft windows server 2019