Exploited
critical
9.3
CWE
191
Advisory Published
Updated

CVE-2021-31956: Windows NTFS Elevation of Privilege Vulnerability

First published: Tue Jun 08 2021(Updated: )

Microsoft Windows New Technology File System (NTFS) contains an unspecified vulnerability that allows attackers to escalate privileges via a specially crafted application.

Credit: secure@microsoft.com secure@microsoft.com secure@microsoft.com

Affected SoftwareAffected VersionHow to fix
Microsoft Windows 10
Microsoft Windows 10=20h2
Microsoft Windows 10=21h1
Microsoft Windows 10=1607
Microsoft Windows 10=1809
Microsoft Windows 10=1909
Microsoft Windows 10=2004
Microsoft Windows 7=sp1
Microsoft Windows 8.1
Microsoft Windows RT 8.1
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2008=sp2
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016
Microsoft Windows Server 2016=20h2
Microsoft Windows Server 2016=2004
Microsoft Windows Server 2019
Microsoft Windows 10 1507<10.0.10240.18967
Microsoft Windows 10 1607<10.0.14393.4467
Microsoft Windows 10 1809<10.0.17763.1999
Microsoft Windows 10 1909<10.0.18363.1621
Microsoft Windows 10 2004<10.0.19041.1052
Microsoft Windows 10 20h2<10.0.19042.1052
Microsoft Windows 10 21h1<10.0.19043.1052
Microsoft Windows Server 2004<10.0.19041.1052
Microsoft Windows Server 2016<10.0.14393.4467
Microsoft Windows Server 2019<10.0.17763.1999
Microsoft Windows Server 20h2<10.0.19042.1052
Microsoft Windows
=1809
<10.0.10240.18967
<10.0.14393.4467
<10.0.17763.1999
<10.0.18363.1621
<10.0.19041.1052
<10.0.19042.1052
<10.0.19043.1052
=sp1
<10.0.19041.1052
=r2-sp1
=sp2
=r2
<10.0.14393.4467
<10.0.17763.1999
<10.0.19042.1052

Remedy

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31956

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-31956?

    CVE-2021-31956 is a vulnerability in Microsoft Windows NTFS that allows attackers to escalate privileges.

  • What software is affected by CVE-2021-31956?

    Microsoft Windows 10, Windows 7, Windows 8.1, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows Server 2016, and Windows Server 2019 are affected.

  • How severe is CVE-2021-31956?

    CVE-2021-31956 has a severity rating of 7.8 (critical).

  • How can I fix CVE-2021-31956?

    Apply the latest security updates from Microsoft to fix CVE-2021-31956.

  • Where can I find more information about CVE-2021-31956?

    You can find more information about CVE-2021-31956 on the Microsoft Security Guidance website.

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