We couldn’t sign you in
Select the account you want to use.

Applies to:

Microsoft .NET Framework 4.8

IMPORTANT Verify that you have installed the required updates listed in the How to get this update section before installing this update. 

IMPORTANT Some customers who use Windows Server 2008 R2 SP1 and have activated their ESU multiple activation key (MAK) add-on before installing the January 14, 2020 updates might need to re-activate their key. Re-activation on the affected devices should only be required once.  For information on activation, see this blog post.

IMPORTANT WSUS scan cab files will continue to be available for Windows 7 SP1 and Windows Server 2008 R2 SP1. If you have a subset of devices running these operating systems without ESU, they might show as non-compliant in your patch management and compliance toolsets.

IMPORTANT Customers who have purchased the Extended Security Update (ESU) for on-premises versions of these operating systems must follow the procedures in KB4522133 to continue receiving security updates after extended support ends on January 14, 2020. For more information on ESU and which editions are supported, see KB4497181.

IMPORTANT Starting on January 15, 2020, a full-screen notification will appear that describes the risk of continuing to use Windows 7 Service Pack 1 after it reaches end of support on January 14, 2020. The notification will remain on the screen until you interact with it. This notification will only appear on the following editions of Windows 7 Service Pack 1:

Note The notification will not appear on domain-joined machines or machines in kiosk mode.

IMPORTANT Starting in August, 2019, updates to .NET Framework 4.6 and above, for Windows Server 2008 SP1, Windows Server 2008 R2 SP1, and Windows 7SP1, require SHA-2 Code signing support. Please make sure that you have all the latest Windows Updates before applying this update to avoid installation issues. For more detailed information about SHA-2 code signing support updates, please see KB 4474419.

Summary

Security Improvements

This security update addresses an issue where an unauthenticated attacker could cause a denial of service on an affected system. For more information please see CVE-2022-26832.

Quality and reliability improvements

Winforms

- Addresses a leak of IRawElementProviderSimple objects which was introduced in .NET Framework 4.8. This is an opt-in fix, add the following compatibility switch to the app.config file in order to dispose the accessible objects:

<runtime>

              <!-- AppContextSwitchOverrides values are in the form of 'key1=true|false;key2=true|false  -->

              <AppContextSwitchOverrides value="Switch.System.Windows.Forms.DisconnectUiaProvidersOnWmDestroy=true"/>

       </runtime>

Note: that when the accessibility server application opts into this fix, the accessibility client will receive errors when accessing the disconnected provider. This is expected because the corresponding control window is destroyed. Previous behavior where the provider was returning information for destroyed controls was incorrect.

NET Libraries

- Addresses an issue when Ssl negotiation can hang indefinitely when client certificates are used when TLS 1.3 is negotiated. Before the change renegotiation (PostHandshakeAuthentiction) would fail and SslStream or HttpWebRequest would observe a timeout.

Known issues in this update

Microsoft is not currently aware of any issues in this update.

Additional information about this update

The following articles contain additional information about this update as it relates to individual product versions.

  • 5012329 Description of the Security and Quality Rollup for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB5012329)

How to obtain and install the update

Before installing this update

Prerequisite:

To apply this update, you must have .NET Framework 4.8 installed.

You must install the updates listed below and restart your device before installing the latest Rollup. Installing these updates improves the reliability of the update process and mitigates potential issues while installing the Rollup and applying Microsoft security fixes.

  1. The March 12, 2019 servicing stack update (SSU) (KB4490628). To get the standalone package for this SSU, search for it in the Microsoft Update Catalog. This update is required to install updates that are only SHA-2 signed.

  2. The latest SHA-2 update (KB4474419) released September 10, 2019. If you are using Windows Update, the latest SHA-2 update will be offered to you automatically. This update is required to install updates that are only SHA-2 signed. For more information on SHA-2 updates, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS.

  3. The Extended Security Updates (ESU) Licensing Preparation Package (KB4538483) released February 11, 2020. The ESU licensing preparation package will be offered to you from WSUS. To get the standalone package for ESU licensing preparation package, search for it in the Microsoft Update Catalog.

Install this update

Release Channel

Available

Next Step

Windows Update and Microsoft Update

Yes

None. This update will be downloaded and installed automatically from Windows Update if you are an ESU customer.

Microsoft Update Catalog

Yes

To get the standalone package for this update, go to the Microsoft Update Catalog website.

Windows Server Update Services (WSUS)

Yes

This update will automatically sync with WSUS if you configure Products and Classifications as follows:

Product: Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1,Windows Embedded Standard 7 Service Pack 1, Windows Embedded POSReady 7

Classification: Security Updates

Restart requirement

You may need to restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.

Update deployment information

For deployment details for this security update, go to the following article in the Microsoft Knowledge Base:

20220412 Security update deployment information: April 12, 2022

Update removal information

Note We do not recommend that you remove any security update. To remove this update, use the Programs and Features item in Control Panel.

Update restart information

This update does not require a system restart after you apply it unless files that are being updated are locked or are being used.

Update replacement information

This update replaces previously released updates KB5009719 and KB5010581.

File Information

x86

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4494.0

36,232

03-Mar-2022

05:52

aspnet_wp.exe

4.8.4494.0

40,880

03-Mar-2022

05:52

clr.dll

4.8.4480.0

8,040,840

03-Mar-2022

05:13

clrjit.dll

4.8.4480.0

554,872

03-Mar-2022

05:13

dfdll.dll

4.8.4290.0

178,040

03-Mar-2022

05:13

mscordacwks.dll

4.8.4480.0

1,307,512

03-Mar-2022

05:13

mscordbi.dll

4.8.4480.0

1,188,728

03-Mar-2022

05:13

mscoreei.dll

4.8.4180.0

581,920

03-Mar-2022

05:13

mscorlib.dll

4.8.4480.0

5,670,776

03-Mar-2022

05:13

mscorsvc.dll

4.8.4331.0

454,032

03-Mar-2022

05:13

mscorsvw.exe

4.8.4331.0

125,880

03-Mar-2022

05:13

ngen.exe

4.8.4331.0

144,360

03-Mar-2022

05:13

Placeholder.dll

4.8.4480.0

18,296

03-Mar-2022

05:13

VsVersion.dll

14.8.4480.0

11,640

03-Mar-2022

05:13

PenIMC2_v0400.dll

4.8.4480.0

99,704

03-Mar-2022

05:13

peverify.dll

4.8.4480.0

182,648

03-Mar-2022

05:13

PresentationCore.dll

4.8.4480.0

3,676,536

03-Mar-2022

05:13

PresentationFramework.dll

4.8.4480.0

6,285,176

03-Mar-2022

05:13

PresentationFramework-SystemData.dll

4.8.4480.0

17,784

03-Mar-2022

05:13

PresentationHost_v0400.dll

4.8.4480.0

233,864

03-Mar-2022

05:13

PresentationHost_v0400.dll.mui

4.8.4480.0

77,688

03-Mar-2022

05:13

PresentationNative_v0400.dll

4.8.4480.0

923,000

03-Mar-2022

05:13

ReachFramework.dll

4.8.4110.0

677,656

03-Mar-2022

05:13

ServiceMonikerSupport.dll

4.8.4465.0

24,464

03-Mar-2022

05:13

SMDiagnostics.dll

4.8.4465.0

66,328

03-Mar-2022

05:13

SOS.dll

4.8.4480.0

767,352

03-Mar-2022

05:13

System.Speech.dll

4.8.4210.0

676,736

03-Mar-2022

05:13

System.Activities.dll

4.8.4465.0

1,526,576

03-Mar-2022

05:13

System.Activities.Presentation.dll

4.8.4180.0

2,127,136

03-Mar-2022

05:13

System.Core.dll

4.8.4480.0

1,549,056

03-Mar-2022

05:13

System.IdentityModel.dll

4.8.4465.0

1,086,752

03-Mar-2022

05:13

System.IdentityModel.Services.dll

4.8.4465.0

191,376

03-Mar-2022

05:13

System.Printing.dll

4.8.4110.0

399,640

03-Mar-2022

05:13

System.Runtime.Serialization.dll

4.8.4465.0

1,047,320

03-Mar-2022

05:13

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

03-Mar-2022

05:13

System.ServiceModel.Channels.dll

4.8.4465.0

150,920

03-Mar-2022

05:13

System.ServiceModel.Discovery.dll

4.8.4465.0

301,432

03-Mar-2022

05:13

System.ServiceModel.dll

4.8.4465.0

6,384,888

03-Mar-2022

05:13

System.ServiceModel.Internals.dll

4.8.4465.0

246,552

03-Mar-2022

05:13

System.ServiceModel.WasHosting.dll

4.8.4465.0

33,160

03-Mar-2022

05:13

System.ServiceModel.Web.dll

4.8.4261.0

321,792

03-Mar-2022

05:13

System.Web.ApplicationServices.dll

4.8.4494.0

65,896

03-Mar-2022

05:30

System.Web.Extensions.dll

4.8.4494.0

1,844,576

03-Mar-2022

05:30

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

03-Mar-2022

05:13

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

03-Mar-2022

05:13

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

03-Mar-2022

05:13

System.Workflow.Runtime.dll

4.8.4110.0

503,064

03-Mar-2022

05:13

System.Configuration.dll

4.8.4190.0

421,536

03-Mar-2022

05:13

System.Data.dll

4.8.4465.0

3,476,880

03-Mar-2022

05:13

System.Deployment.dll

4.8.4290.0

1,593,624

03-Mar-2022

05:13

System.dll

4.8.4494.0

3,556,712

03-Mar-2022

05:30

System.Drawing.Design.dll

4.8.4210.0

125,192

03-Mar-2022

05:13

System.Drawing.dll

4.8.4395.0

595,728

03-Mar-2022

05:13

System.Management.dll

4.8.4450.0

408,856

03-Mar-2022

05:13

System.Security.dll

4.8.4261.0

320,280

03-Mar-2022

05:13

System.Web.dll

4.8.4494.0

5,410,184

03-Mar-2022

05:52

System.Windows.Controls.Ribbon.dll

4.8.4480.0

743,800

03-Mar-2022

05:13

System.Windows.Forms.dll

4.8.4494.0

5,922,144

03-Mar-2022

05:30

System.Xaml.dll

4.8.4480.0

632,056

03-Mar-2022

05:13

UIAutomationClient.dll

4.8.4480.0

171,384

03-Mar-2022

05:13

UIAutomationClientsideProviders.dll

4.8.4480.0

354,168

03-Mar-2022

05:13

UIAutomationProvider.dll

4.8.4480.0

41,848

03-Mar-2022

05:13

UIAutomationTypes.dll

4.8.4480.0

215,928

03-Mar-2022

05:13

webengine.dll

4.8.4494.0

20,400

03-Mar-2022

05:52

webengine4.dll

4.8.4494.0

565,680

03-Mar-2022

05:52

WindowsBase.dll

4.8.4480.0

1,299,320

03-Mar-2022

05:13

WindowsFormsIntegration.dll

4.8.4180.0

105,248

03-Mar-2022

05:13

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

03-Mar-2022

05:13

WPFFontCache_v0400.exe.mui

4.8.4480.0

12,152

03-Mar-2022

05:13

WPFFontCache_v0400.exe

4.8.4480.0

19,856

03-Mar-2022

05:13

wpfgfx_v0400.dll

4.8.4480.0

1,619,320

03-Mar-2022

05:13

x64

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4494.0

41,864

03-Mar-2022

05:30

Aspnet_perf.dll

4.8.4494.0

36,232

03-Mar-2022

05:52

aspnet_wp.exe

4.8.4494.0

45,448

03-Mar-2022

05:30

aspnet_wp.exe

4.8.4494.0

40,880

03-Mar-2022

05:52

clr.dll

4.8.4480.0

11,242,376

03-Mar-2022

05:13

clr.dll

4.8.4480.0

8,040,840

03-Mar-2022

05:13

clrjit.dll

4.8.4480.0

1,358,200

03-Mar-2022

05:13

clrjit.dll

4.8.4480.0

554,872

03-Mar-2022

05:13

compatjit.dll

4.8.4480.0

1,273,208

03-Mar-2022

05:13

dfdll.dll

4.8.4290.0

214,920

03-Mar-2022

05:13

dfdll.dll

4.8.4290.0

178,040

03-Mar-2022

05:13

mscordacwks.dll

4.8.4480.0

1,801,080

03-Mar-2022

05:13

mscordacwks.dll

4.8.4480.0

1,307,512

03-Mar-2022

05:13

mscordbi.dll

4.8.4480.0

1,655,160

03-Mar-2022

05:13

mscordbi.dll

4.8.4480.0

1,188,728

03-Mar-2022

05:13

mscoreei.dll

4.8.4180.0

689,952

03-Mar-2022

05:13

mscoreei.dll

4.8.4180.0

581,920

03-Mar-2022

05:13

mscorlib.dll

4.8.4480.0

5,431,672

03-Mar-2022

05:13

mscorlib.dll

4.8.4480.0

5,670,776

03-Mar-2022

05:13

mscorsvc.dll

4.8.4331.0

557,944

03-Mar-2022

05:13

mscorsvc.dll

4.8.4331.0

454,032

03-Mar-2022

05:13

mscorsvw.exe

4.8.4331.0

152,000

03-Mar-2022

05:13

mscorsvw.exe

4.8.4331.0

125,880

03-Mar-2022

05:13

ngen.exe

4.8.4331.0

174,568

03-Mar-2022

05:13

ngen.exe

4.8.4331.0

144,360

03-Mar-2022

05:13

VsVersion.dll

14.8.4480.0

11,640

03-Mar-2022

05:13

Placeholder.dll

4.8.4480.0

20,344

03-Mar-2022

05:13

Placeholder.dll

4.8.4480.0

18,296

03-Mar-2022

05:13

VsVersion.dll

14.8.4480.0

11,640

03-Mar-2022

05:13

PenIMC2_v0400.dll

4.8.4480.0

120,696

03-Mar-2022

05:13

PenIMC2_v0400.dll

4.8.4480.0

99,704

03-Mar-2022

05:13

peverify.dll

4.8.4480.0

265,608

03-Mar-2022

05:13

peverify.dll

4.8.4480.0

182,648

03-Mar-2022

05:13

PresentationCore.dll

4.8.4480.0

3,652,472

03-Mar-2022

05:13

PresentationCore.dll

4.8.4480.0

3,676,536

03-Mar-2022

05:13

PresentationFramework.dll

4.8.4480.0

6,285,176

03-Mar-2022

05:13

PresentationFramework-SystemData.dll

4.8.4480.0

17,784

03-Mar-2022

05:13

PresentationHost_v0400.dll

4.8.4480.0

302,456

03-Mar-2022

05:13

PresentationHost_v0400.dll.mui

4.8.4480.0

77,688

03-Mar-2022

05:13

PresentationHost_v0400.dll

4.8.4480.0

233,864

03-Mar-2022

05:13

PresentationHost_v0400.dll.mui

4.8.4480.0

77,688

03-Mar-2022

05:13

PresentationNative_v0400.dll

4.8.4480.0

1,164,152

03-Mar-2022

05:13

PresentationNative_v0400.dll

4.8.4480.0

923,000

03-Mar-2022

05:13

ReachFramework.dll

4.8.4110.0

677,656

03-Mar-2022

05:13

ServiceMonikerSupport.dll

4.8.4465.0

27,528

03-Mar-2022

05:13

ServiceMonikerSupport.dll

4.8.4465.0

24,464

03-Mar-2022

05:13

SMDiagnostics.dll

4.8.4465.0

66,328

03-Mar-2022

05:13

SOS.dll

4.8.4480.0

921,464

03-Mar-2022

05:13

SOS.dll

4.8.4480.0

767,352

03-Mar-2022

05:13

System.Speech.dll

4.8.4210.0

676,736

03-Mar-2022

05:13

System.Activities.dll

4.8.4465.0

1,526,576

03-Mar-2022

05:13

System.Activities.Presentation.dll

4.8.4180.0

2,127,136

03-Mar-2022

05:13

System.Core.dll

4.8.4480.0

1,549,056

03-Mar-2022

05:13

System.IdentityModel.dll

4.8.4465.0

1,086,752

03-Mar-2022

05:13

System.IdentityModel.Services.dll

4.8.4465.0

191,376

03-Mar-2022

05:13

System.Printing.dll

4.8.4110.0

400,152

03-Mar-2022

05:13

System.Printing.dll

4.8.4110.0

399,640

03-Mar-2022

05:13

System.Runtime.Serialization.dll

4.8.4465.0

1,047,320

03-Mar-2022

05:13

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

03-Mar-2022

05:13

System.ServiceModel.Channels.dll

4.8.4465.0

150,920

03-Mar-2022

05:13

System.ServiceModel.Discovery.dll

4.8.4465.0

301,432

03-Mar-2022

05:13

System.ServiceModel.dll

4.8.4465.0

6,384,888

03-Mar-2022

05:13

System.ServiceModel.Internals.dll

4.8.4465.0

246,552

03-Mar-2022

05:13

System.ServiceModel.WasHosting.dll

4.8.4465.0

33,160

03-Mar-2022

05:13

System.ServiceModel.Web.dll

4.8.4261.0

321,792

03-Mar-2022

05:13

System.Web.ApplicationServices.dll

4.8.4494.0

65,896

03-Mar-2022

05:30

System.Web.Extensions.dll

4.8.4494.0

1,844,576

03-Mar-2022

05:30

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

03-Mar-2022

05:13

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

03-Mar-2022

05:13

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

03-Mar-2022

05:13

System.Workflow.Runtime.dll

4.8.4110.0

503,064

03-Mar-2022

05:13

System.configuration.dll

4.8.4190.0

421,536

03-Mar-2022

05:13

System.Data.dll

4.8.4465.0

3,543,928

03-Mar-2022

05:13

System.Data.dll

4.8.4465.0

3,476,880

03-Mar-2022

05:13

System.Deployment.dll

4.8.4290.0

1,593,624

03-Mar-2022

05:13

System.dll

4.8.4494.0

3,556,712

03-Mar-2022

05:30

System.Drawing.Design.dll

4.8.4210.0

125,192

03-Mar-2022

05:13

System.Drawing.dll

4.8.4395.0

595,728

03-Mar-2022

05:13

System.Management.dll

4.8.4450.0

408,856

03-Mar-2022

05:13

System.Security.dll

4.8.4261.0

320,280

03-Mar-2022

05:13

System.Web.dll

4.8.4494.0

5,398,408

03-Mar-2022

05:30

System.Web.dll

4.8.4494.0

5,410,184

03-Mar-2022

05:52

System.Windows.Controls.Ribbon.dll

4.8.4480.0

743,800

03-Mar-2022

05:13

System.Windows.Forms.dll

4.8.4494.0

5,922,144

03-Mar-2022

05:30

System.Xaml.dll

4.8.4480.0

632,056

03-Mar-2022

05:13

UIAutomationClient.dll

4.8.4480.0

171,384

03-Mar-2022

05:13

UIAutomationClientsideProviders.dll

4.8.4480.0

354,168

03-Mar-2022

05:13

UIAutomationProvider.dll

4.8.4480.0

41,848

03-Mar-2022

05:13

UIAutomationTypes.dll

4.8.4480.0

215,928

03-Mar-2022

05:13

webengine.dll

4.8.4494.0

21,384

03-Mar-2022

05:30

webengine.dll

4.8.4494.0

20,400

03-Mar-2022

05:52

webengine4.dll

4.8.4494.0

675,200

03-Mar-2022

05:30

webengine4.dll

4.8.4494.0

565,680

03-Mar-2022

05:52

WindowsBase.dll

4.8.4480.0

1,299,320

03-Mar-2022

05:13

WindowsFormsIntegration.dll

4.8.4180.0

105,248

03-Mar-2022

05:13

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

102,672

03-Mar-2022

05:13

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

03-Mar-2022

05:13

WPFFontCache_v0400.exe.mui

4.8.4480.0

12,152

03-Mar-2022

05:13

WPFFontCache_v0400.exe.mui

4.8.4480.0

12,152

03-Mar-2022

05:13

WPFFontCache_v0400.exe

4.8.4480.0

21,920

03-Mar-2022

05:13

WPFFontCache_v0400.exe

4.8.4480.0

19,856

03-Mar-2022

05:13

wpfgfx_v0400.dll

4.8.4480.0

2,050,936

03-Mar-2022

05:13

wpfgfx_v0400.dll

4.8.4480.0

1,619,320

03-Mar-2022

05:13

Information about protection and security

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!

×