Exploited
high
7.8
Advisory Published
Updated

CVE-2021-40450: Microsoft Win32k Privilege Escalation Vulnerability

First published: Wed Oct 13 2021(Updated: )

Microsoft Win32k 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=20h2
Microsoft Windows 10=20h2
Microsoft Windows 10=20h2
Microsoft Windows 10=21h1
Microsoft Windows 10=21h1
Microsoft Windows 10=21h1
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 Server=20h2
Microsoft Windows Server 2016=2004
Microsoft Windows Server 2019
Microsoft Windows Server 2022
Microsoft Windows 10 1809<10.0.17763.2237
Microsoft Windows 10 1909<10.0.18363.1854
Microsoft Windows 10 2004<10.0.19041.1288
Microsoft Windows 10 20h2<10.0.19042.1288
Microsoft Windows 10 21h1<10.0.19043.1288
Microsoft Windows 11 21h2<10.0.22000.258
Microsoft Windows Server 2004<10.0.19041.1288
Microsoft Windows Server 2019<10.0.17763.2237
Microsoft Windows Server 2022<10.0.20348.288
Microsoft Windows Server 20h2<10.0.19042.1288
Microsoft Win32k
<10.0.17763.2237
<10.0.18363.1854
<10.0.19041.1288
<10.0.19042.1288
<10.0.19043.1288
<10.0.22000.258
<10.0.19041.1288
<10.0.17763.2237
<10.0.20348.288
<10.0.19042.1288

Remedy

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40450

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-40450?

    CVE-2021-40450 is a vulnerability in Microsoft Win32k that allows for privilege escalation.

  • Which versions of Microsoft Windows are affected by CVE-2021-40450?

    Microsoft Windows 10 versions 20H2, 21H1, 1809, 1909, and 2004, Microsoft Windows 11, and Microsoft Windows Server versions 20H2, 2016, 2019, and 2022 are affected by CVE-2021-40450.

  • What is the severity of CVE-2021-40450?

    CVE-2021-40450 has a severity rating of 7.8, which is considered high.

  • How can I fix CVE-2021-40450?

    To fix CVE-2021-40450, Microsoft has released a security update. It is recommended to update your system to the latest version of Microsoft Windows or Windows Server.

  • Where can I find more information about CVE-2021-40450?

    You can find more information about CVE-2021-40450 on the Microsoft Security Guidance website.

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