.NET Framework January Security and Quality Rollup Update

Tara Overfield

Tara

Today, we are releasing the January 2021 Security and Quality Rollup Updates for .NET Framework.

Security

The January Security and Quality Rollup Update does not contain any new security fixes. See October 2020 Security and Quality Rollup for the latest security updates.

Quality and Reliability

This release contains the following quality and reliability improvements.

CLR1
  • Improved the clean-up process for X509Certificate2 certificates
WPF2
  • Addressed an issue with a FailFast crash arising in apps with two threads that both load application resources.

1 Common Language Runtime (CLR) 2 Windows Presentation Foundation (WPF)

Getting the Update

The Security and Quality Rollup is available via Windows Update, Windows Server Update Services, and Microsoft Update Catalog.

Microsoft Update Catalog

You can get the update via the Microsoft Update Catalog. For Windows 10, NET Framework 4.8 updates are available via Windows Update, Windows Server Update Services, Microsoft Update Catalog. Updates for other versions of .NET Framework are part of the Windows 10 Monthly Cumulative Update.

**Note**: Customers that rely on Windows Update and Windows Server Update Services will automatically receive the .NET Framework version-specific updates. Advanced system administrators can also take use of the below direct Microsoft Update Catalog download links to .NET Framework-specific updates. Before applying these updates, please ensure that you carefully review the .NET Framework version applicability, to ensure that you only install updates on systems where they apply.

The following table is for Windows 10 and Windows Server 2016+ versions.

Product VersionCumulative Update
Windows 10, version 20H2 and Windows Server, version 20H2
.NET Framework 3.5, 4.8Catalog4586876
Windows 10 2004 and Windows Server, version 2004
.NET Framework 3.5, 4.8Catalog4586876
Windows 10 1909 and Windows Server, version 1909
.NET Framework 3.5, 4.8Catalog4586878
Windows 10 1903 and Windows Server, version 1903
.NET Framework 3.5, 4.8Catalog4586878
Windows 10 1809 (October 2018 Update) and Windows Server 20194598499
.NET Framework 3.5, 4.7.2Catalog4586875
.NET Framework 3.5, 4.8Catalog4586877
Windows 10 1803 (April 2018 Update)
.NET Framework 3.5, 4.7.2Catalog4598245
.NET Framework 4.8Catalog4597249
Windows 10 1709 (Fall Creators Update)
.NET Framework 3.5, 4.7.1, 4.7.2Catalog4598234
.NET Framework 4.8Catalog4597248
Windows 10 1607 (Anniversary Update) and Windows Server 2016
.NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2Catalog4598243
.NET Framework 4.8Catalog4597247
Windows 10 1507
.NET Framework 3.5, 4.6, 4.6.1, 4.6.2Catalog4598231
Azure Stack HCI, version 20H2
.NET Framework 4.7.2Catalog4586874

The following table is for earlier Windows and Windows Server versions.

Product VersionSecurity and Quality Rollup
Windows 8.1, Windows RT 8.1 and Windows Server 2012 R24598502
.NET Framework 4.5.2Catalog4578956
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2Catalog4597238
.NET Framework 4.8Catalog4597253
.NET Framework 4.8Catalog4486105
Windows Server 20124598501
.NET Framework 4.5.2Catalog4578954
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2Catalog4597237
.NET Framework 4.8Catalog4597252
.NET Framework 4.8Catalog4486081
Windows 7 SP1 and Windows Server 2008 R2 SP14598500
.NET Framework 4.5.2Catalog4578955
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2Catalog4597239
.NET Framework 4.8Catalog4597254
.NET Framework 4.8Catalog
Windows Server 20084598503
.NET Framework 4.5.2Catalog4578955
.NET Framework 4.6Catalog4597239

 

Previous Monthly Rollups

The last few .NET Framework Monthly updates are listed below for your convenience:

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