Exploited
high
7.8
Advisory Published
Updated

CVE-2021-36955: Windows Common Log File System Driver Elevation of Privilege Vulnerability

First published: Wed Sep 15 2021(Updated: )

Microsoft Windows Common Log File System (CLFS) driver contains an unspecified vulnerability that allows for privilege escalation.

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
Microsoft Windows Server=sp2
Microsoft Windows Server=r2-sp1
Microsoft Windows Server
Microsoft Windows Server=r2
Microsoft Windows Server 2016
Microsoft Windows Server 2016=20h2
Microsoft Windows Server 2016=2004
Microsoft Windows Server 2019
Microsoft Windows Server 2022
Microsoft Windows
Microsoft Windows 10<10.0.10240.19060
Microsoft Windows 10<10.0.14393.4651
Microsoft Windows 10<10.0.17763.2183
Microsoft Windows 10<10.0.18363.1801
Microsoft Windows 10<10.0.19041.1237
Microsoft Windows 10<10.0.19042.1237
Microsoft Windows 10<10.0.19043.1237
Microsoft Windows Server 2004<10.0.19041.1237
Microsoft Windows Server 2016<10.0.14393.4651
Microsoft Windows Server 2019<10.0.17763.2183
Microsoft Windows Server 2022<10.0.20348.230
Microsoft Windows Server 20H2<10.0.19042.1237
<10.0.10240.19060
<10.0.14393.4651
<10.0.17763.2183
<10.0.18363.1801
<10.0.19041.1237
<10.0.19042.1237
<10.0.19043.1237
=sp1
<10.0.19041.1237
=sp2
=r2-sp1
=r2
<10.0.14393.4651
<10.0.17763.2183
<10.0.20348.230
<10.0.19042.1237

Remedy

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36955

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-36955?

    The severity of CVE-2021-36955 is considered high, indicating a significant risk of privilege escalation.

  • How do I fix CVE-2021-36955?

    To fix CVE-2021-36955, ensure that your Microsoft Windows systems are updated with the latest security patches provided by Microsoft.

  • What systems are affected by CVE-2021-36955?

    CVE-2021-36955 affects various versions of Microsoft Windows, including Windows 7, Windows 8.1, and multiple editions of Windows 10 and Windows Server.

  • Is there a workaround for CVE-2021-36955?

    There are no known workarounds for CVE-2021-36955; applying the security update is the recommended solution.

  • Can CVE-2021-36955 be exploited remotely?

    CVE-2021-36955 does not require remote access to exploit, but an authenticated user may escalate their privileges if vulnerable.

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