Applies to:

Microsoft .NET Framework 4.8

REMINDER Windows Server 2008 R2 SP1 have reached the end of mainstream support and are now in extended security update (ESU) support.

Starting in July 2020, there will no longer be optional, non-security releases (known as "C" releases) for this operating system. Operating systems in extended support have only cumulative monthly security updates (known as the "B" or Update Tuesday release).

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

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. For more information, see the ESU blog.

The May 14, 2024 update for Windows Server 2008 R2 SP1 includes cumulative security and reliability improvements in .NET Framework 4.8. We recommend that you apply this update as part of your regular maintenance routines. Verify that you have installed the required updates listed in the How to get this update section before installing this update.

Summary

Security Improvements

There are no new security improvements in this release. This update is cumulative and contains all previously released security improvements.

Quality and Reliability Improvements

CLR1

- Addresses an issue where crashes can occur if several threads all concurrently query the ITypeInfo implementation of the same managed type

.NET Libraries

- Addresses an issue where 32-bit platform show a significant response time regression.

- Addresses an issue to use MIST validated implementations of FIPS algorithms.

.NET Fundamentals

- Addresses an issue with wildcard format changes introduced in IIS 10.

WPF2

- Addresses an issue where apps crash when calling GetWindowText and GetWindowTextLength methods.

1Common Language Runtime (CLR)

2Windows Presentation Foundation (WPF)

Additional information about this update

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

  • 5038288 Description of the Security and Quality Rollup for .NET Framework 3.5.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Server 2008 R2 SP1 (KB5038288)

Known issues in this update

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

How to get this 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 or newer update. 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. To get this security update, you must reinstall the "Extended Security Updates (ESU) Licensing Preparation Package" (KB5016892) for Windows Server 2008 R2 SP1 that is dated August 8, 2022 even if you previously installed the ESU key. 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.

  4. After you install the items above, we strongly recommend that you install the latest SSU.

    ​​​​​​​For Windows Server 2008 R2 SP1, you must have the servicing stack update (SSU) (KB5017397) that is dated September 13, 2022 or later installed. For more information about the latest SSU updates, see ADV990001 | Latest Servicing Stack Updates. If you use Windows Update, the latest SSU will be offered to you automatically if you are an ESU customer. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.

  5. Download the ESU MAK add-on key from the VLSC portal and deploy and activate the ESU MAK add-on key. If you use the Volume Activation Management Tool  (VAMT) to deploy and activate keys, follow the instructions here.

    IMPORTANT You do not need an additional key for deployment of the following:

    • You do not need to deploy an additional ESU key for Azure virtual machines (VMs), Azure Stack HCI.

    • For other Azure products such as Azure VMWare, Azure Nutanix solution Azure Stack (Hub, Edge), or for bring-your-own images on Azure for Windows Server 2008 SP2, and Windows Server 2008 R2 SP1 you do need to deploy the ESU key.  The steps to install, activate, and deploy ESUs are the same for the fourth year of ESU coverage.

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 individual .NET Framework product update will be installed, as applicable, by applying the operating system update. For more information about operating system updates see additional information about this update section.

Update replacement information

This update replaces previously released updates KB5037038 and KB5034687.

File Information

x86

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4718.0

37,296

11-Apr-2024

03:29

aspnet_wp.exe

4.8.4718.0

41,000

11-Apr-2024

03:29

clr.dll

4.8.4729.0

8,658,352

11-Apr-2024

03:36

clrcompression.dll

4.8.4700.0

123,824

11-Apr-2024

03:29

clrjit.dll

4.8.4729.0

556,064

11-Apr-2024

03:36

dfdll.dll

4.8.4654.0

179,080

11-Apr-2024

03:29

diasymreader.dll

14.8.4667.0

1,079,232

11-Apr-2024

03:29

mscordacwks.dll

4.8.4729.0

1,308,576

11-Apr-2024

03:36

mscordbi.dll

4.8.4729.0

1,189,280

11-Apr-2024

03:36

mscoreei.dll

4.8.4180.0

581,920

11-Apr-2024

03:29

mscorlib.dll

4.8.4729.0

5,729,200

11-Apr-2024

03:36

mscorsvc.dll

4.8.4331.0

454,032

11-Apr-2024

03:29

mscorsvw.exe

4.8.4331.0

125,880

11-Apr-2024

03:29

ngen.exe

4.8.4331.0

144,360

11-Apr-2024

03:29

Placeholder.dll

4.8.4729.0

19,392

11-Apr-2024

03:36

VsVersion.dll

14.8.4729.0

12,848

11-Apr-2024

03:36

PenIMC2_v0400.dll

4.8.4729.0

100,800

11-Apr-2024

03:36

peverify.dll

4.8.4729.0

183,744

11-Apr-2024

03:36

PresentationCore.dll

4.8.4729.0

3,678,128

11-Apr-2024

03:36

PresentationFramework.dll

4.8.4729.0

6,294,960

11-Apr-2024

03:29

PresentationFramework-SystemData.dll

4.8.4729.0

18,976

11-Apr-2024

03:29

PresentationHost_v0400.dll

4.8.4729.0

235,040

11-Apr-2024

03:36

PresentationHost_v0400.dll.mui

4.8.4729.0

78,896

11-Apr-2024

03:36

PresentationNative_v0400.dll

4.8.4729.0

924,080

11-Apr-2024

03:36

ReachFramework.dll

4.8.4110.0

677,656

11-Apr-2024

03:29

ServiceMonikerSupport.dll

4.8.4729.0

25,520

11-Apr-2024

03:36

SMDiagnostics.dll

4.8.4729.0

68,680

11-Apr-2024

03:29

SOS.dll

4.8.4729.0

769,056

11-Apr-2024

03:36

System.Speech.dll

4.8.4210.0

676,736

11-Apr-2024

03:29

System.Activities.dll

4.8.4729.0

1,528,904

11-Apr-2024

03:29

System.Activities.Presentation.dll

4.8.4526.0

2,121,104

11-Apr-2024

03:29

System.Core.dll

4.8.4729.0

1,550,808

11-Apr-2024

03:29

System.IdentityModel.dll

4.8.4729.0

1,090,416

11-Apr-2024

03:29

System.IdentityModel.Services.dll

4.8.4729.0

192,536

11-Apr-2024

03:29

System.Printing.dll

4.8.4110.0

399,640

11-Apr-2024

03:29

System.Runtime.Serialization.dll

4.8.4729.0

1,049,704

11-Apr-2024

03:29

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

11-Apr-2024

03:29

System.ServiceModel.Channels.dll

4.8.4729.0

152,096

11-Apr-2024

03:29

System.ServiceModel.Discovery.dll

4.8.4729.0

302,640

11-Apr-2024

03:29

System.ServiceModel.dll

4.8.4729.0

6,387,680

11-Apr-2024

03:29

System.ServiceModel.Internals.dll

4.8.4729.0

248,904

11-Apr-2024

03:29

System.ServiceModel.WasHosting.dll

4.8.4729.0

34,224

11-Apr-2024

03:29

System.ServiceModel.Web.dll

4.8.4261.0

321,792

11-Apr-2024

03:29

System.Web.ApplicationServices.dll

4.8.4718.0

66,120

11-Apr-2024

03:29

System.Web.Extensions.dll

4.8.4718.0

1,845,240

11-Apr-2024

03:29

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

11-Apr-2024

03:29

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

11-Apr-2024

03:29

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

11-Apr-2024

03:29

System.Workflow.Runtime.dll

4.8.4110.0

503,064

11-Apr-2024

03:29

System.Configuration.dll

4.8.4190.0

421,536

11-Apr-2024

03:29

System.Data.dll

4.8.4690.0

3,480,608

11-Apr-2024

03:29

System.Deployment.dll

4.8.4654.0

1,596,304

11-Apr-2024

03:29

System.DirectoryServices.dll

4.8.4510.0

418,112

11-Apr-2024

03:29

System.dll

4.8.4718.0

3,561,952

11-Apr-2024

03:29

System.Drawing.Design.dll

4.8.4210.0

125,192

11-Apr-2024

03:29

System.Drawing.dll

4.8.4395.0

595,728

11-Apr-2024

03:29

System.Management.dll

4.8.4450.0

408,856

11-Apr-2024

03:29

System.Runtime.Remoting.dll

4.8.4690.0

343,008

11-Apr-2024

03:29

System.Security.dll

4.8.4261.0

320,280

11-Apr-2024

03:29

System.Web.dll

4.8.4718.0

5,412,896

11-Apr-2024

03:29

System.Windows.Controls.Ribbon.dll

4.8.4729.0

744,984

11-Apr-2024

03:29

System.Windows.Forms.dll

4.8.4654.0

5,922,672

11-Apr-2024

03:29

System.Xaml.dll

4.8.4729.0

634,472

11-Apr-2024

03:29

UIAutomationClient.dll

4.8.4729.0

172,480

11-Apr-2024

03:29

UIAutomationClientsideProviders.dll

4.8.4729.0

355,248

11-Apr-2024

03:29

UIAutomationProvider.dll

4.8.4729.0

42,944

11-Apr-2024

03:29

UIAutomationTypes.dll

4.8.4729.0

217,008

11-Apr-2024

03:29

webengine.dll

4.8.4718.0

20,400

11-Apr-2024

03:29

webengine4.dll

4.8.4718.0

565,792

11-Apr-2024

03:29

WindowsBase.dll

4.8.4729.0

1,300,400

11-Apr-2024

03:29

WindowsFormsIntegration.dll

4.8.4614.0

102,336

11-Apr-2024

03:29

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

11-Apr-2024

03:29

WPFFontCache_v0400.exe.mui

4.8.4729.0

13,232

11-Apr-2024

03:36

WPFFontCache_v0400.exe

4.8.4729.0

20,952

11-Apr-2024

03:36

wpfgfx_v0400.dll

4.8.4729.0

1,620,400

11-Apr-2024

03:36

x64

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4718.0

43,056

11-Apr-2024

03:29

Aspnet_perf.dll

4.8.4718.0

37,296

11-Apr-2024

03:29

aspnet_wp.exe

4.8.4718.0

46,520

11-Apr-2024

03:29

aspnet_wp.exe

4.8.4718.0

41,000

11-Apr-2024

03:29

clr.dll

4.8.4729.0

11,710,896

11-Apr-2024

03:29

clr.dll

4.8.4729.0

8,658,352

11-Apr-2024

03:36

clrcompression.dll

4.8.4700.0

141,856

11-Apr-2024

03:29

clrcompression.dll

4.8.4700.0

123,824

11-Apr-2024

03:29

clrjit.dll

4.8.4729.0

1,359,288

11-Apr-2024

03:29

clrjit.dll

4.8.4729.0

556,064

11-Apr-2024

03:36

compatjit.dll

4.8.4729.0

1,274,288

11-Apr-2024

03:29

dfdll.dll

4.8.4654.0

215,944

11-Apr-2024

03:29

dfdll.dll

4.8.4654.0

179,080

11-Apr-2024

03:29

diasymreader.dll

14.8.4667.0

1,494,920

11-Apr-2024

03:29

diasymreader.dll

14.8.4667.0

1,079,232

11-Apr-2024

03:29

mscordacwks.dll

4.8.4729.0

1,803,688

11-Apr-2024

03:29

mscordacwks.dll

4.8.4729.0

1,308,576

11-Apr-2024

03:36

mscordbi.dll

4.8.4729.0

1,655,712

11-Apr-2024

03:29

mscordbi.dll

4.8.4729.0

1,189,280

11-Apr-2024

03:36

mscoreei.dll

4.8.4180.0

689,952

11-Apr-2024

03:29

mscoreei.dll

4.8.4180.0

581,920

11-Apr-2024

03:29

mscorlib.dll

4.8.4729.0

5,491,632

11-Apr-2024

03:29

mscorlib.dll

4.8.4729.0

5,729,200

11-Apr-2024

03:36

mscorsvc.dll

4.8.4331.0

557,944

11-Apr-2024

03:29

mscorsvc.dll

4.8.4331.0

454,032

11-Apr-2024

03:29

mscorsvw.exe

4.8.4331.0

152,000

11-Apr-2024

03:29

mscorsvw.exe

4.8.4331.0

125,880

11-Apr-2024

03:29

ngen.exe

4.8.4331.0

174,568

11-Apr-2024

03:29

ngen.exe

4.8.4331.0

144,360

11-Apr-2024

03:29

VsVersion.dll

14.8.4729.0

12,720

11-Apr-2024

03:29

Placeholder.dll

4.8.4729.0

21,440

11-Apr-2024

03:29

Placeholder.dll

4.8.4729.0

19,392

11-Apr-2024

03:36

VsVersion.dll

14.8.4729.0

12,848

11-Apr-2024

03:36

PenIMC2_v0400.dll

4.8.4729.0

121,792

11-Apr-2024

03:29

PenIMC2_v0400.dll

4.8.4729.0

100,800

11-Apr-2024

03:36

peverify.dll

4.8.4729.0

266,672

11-Apr-2024

03:29

peverify.dll

4.8.4729.0

183,744

11-Apr-2024

03:36

PresentationCore.dll

4.8.4729.0

3,654,688

11-Apr-2024

03:29

PresentationCore.dll

4.8.4729.0

3,678,128

11-Apr-2024

03:36

PresentationFramework.dll

4.8.4729.0

6,294,960

11-Apr-2024

03:29

PresentationFramework-SystemData.dll

4.8.4729.0

18,976

11-Apr-2024

03:29

PresentationHost_v0400.dll

4.8.4729.0

303,536

11-Apr-2024

03:29

PresentationHost_v0400.dll.mui

4.8.4729.0

78,784

11-Apr-2024

03:29

PresentationHost_v0400.dll

4.8.4729.0

235,040

11-Apr-2024

03:36

PresentationHost_v0400.dll.mui

4.8.4729.0

78,896

11-Apr-2024

03:36

PresentationNative_v0400.dll

4.8.4729.0

1,165,360

11-Apr-2024

03:29

PresentationNative_v0400.dll

4.8.4729.0

924,080

11-Apr-2024

03:36

ReachFramework.dll

4.8.4110.0

677,656

11-Apr-2024

03:29

ServiceMonikerSupport.dll

4.8.4729.0

28,592

11-Apr-2024

03:29

ServiceMonikerSupport.dll

4.8.4729.0

25,520

11-Apr-2024

03:36

SMDiagnostics.dll

4.8.4729.0

68,680

11-Apr-2024

03:29

SOS.dll

4.8.4729.0

923,160

11-Apr-2024

03:29

SOS.dll

4.8.4729.0

769,056

11-Apr-2024

03:36

System.Speech.dll

4.8.4210.0

676,736

11-Apr-2024

03:29

System.Activities.dll

4.8.4729.0

1,528,904

11-Apr-2024

03:29

System.Activities.Presentation.dll

4.8.4526.0

2,121,104

11-Apr-2024

03:29

System.Core.dll

4.8.4729.0

1,550,808

11-Apr-2024

03:29

System.IdentityModel.dll

4.8.4729.0

1,090,416

11-Apr-2024

03:29

System.IdentityModel.Services.dll

4.8.4729.0

192,536

11-Apr-2024

03:29

System.Printing.dll

4.8.4110.0

400,152

11-Apr-2024

03:29

System.Printing.dll

4.8.4110.0

399,640

11-Apr-2024

03:29

System.Runtime.Serialization.dll

4.8.4729.0

1,049,704

11-Apr-2024

03:29

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

11-Apr-2024

03:29

System.ServiceModel.Channels.dll

4.8.4729.0

152,096

11-Apr-2024

03:29

System.ServiceModel.Discovery.dll

4.8.4729.0

302,640

11-Apr-2024

03:29

System.ServiceModel.dll

4.8.4729.0

6,387,680

11-Apr-2024

03:29

System.ServiceModel.Internals.dll

4.8.4729.0

248,904

11-Apr-2024

03:29

System.ServiceModel.WasHosting.dll

4.8.4729.0

34,224

11-Apr-2024

03:29

System.ServiceModel.Web.dll

4.8.4261.0

321,792

11-Apr-2024

03:29

System.Web.ApplicationServices.dll

4.8.4718.0

66,120

11-Apr-2024

03:29

System.Web.Extensions.dll

4.8.4718.0

1,845,240

11-Apr-2024

03:29

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

11-Apr-2024

03:29

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

11-Apr-2024

03:29

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

11-Apr-2024

03:29

System.Workflow.Runtime.dll

4.8.4110.0

503,064

11-Apr-2024

03:29

System.configuration.dll

4.8.4190.0

421,536

11-Apr-2024

03:29

System.Data.dll

4.8.4690.0

3,547,168

11-Apr-2024

03:29

System.Data.dll

4.8.4690.0

3,480,608

11-Apr-2024

03:29

System.Deployment.dll

4.8.4654.0

1,596,304

11-Apr-2024

03:29

System.DirectoryServices.dll

4.8.4510.0

418,112

11-Apr-2024

03:29

System.dll

4.8.4718.0

3,561,952

11-Apr-2024

03:29

System.Drawing.Design.dll

4.8.4210.0

125,192

11-Apr-2024

03:29

System.Drawing.dll

4.8.4395.0

595,728

11-Apr-2024

03:29

System.Management.dll

4.8.4450.0

408,856

11-Apr-2024

03:29

System.Runtime.Remoting.dll

4.8.4690.0

343,008

11-Apr-2024

03:29

System.Security.dll

4.8.4261.0

320,280

11-Apr-2024

03:29

System.Web.dll

4.8.4718.0

5,400,496

11-Apr-2024

03:29

System.Web.dll

4.8.4718.0

5,412,896

11-Apr-2024

03:29

System.Windows.Controls.Ribbon.dll

4.8.4729.0

744,984

11-Apr-2024

03:29

System.Windows.Forms.dll

4.8.4654.0

5,922,672

11-Apr-2024

03:29

System.Xaml.dll

4.8.4729.0

634,472

11-Apr-2024

03:29

UIAutomationClient.dll

4.8.4729.0

172,480

11-Apr-2024

03:29

UIAutomationClientsideProviders.dll

4.8.4729.0

355,248

11-Apr-2024

03:29

UIAutomationProvider.dll

4.8.4729.0

42,944

11-Apr-2024

03:29

UIAutomationTypes.dll

4.8.4729.0

217,008

11-Apr-2024

03:29

webengine.dll

4.8.4718.0

22,448

11-Apr-2024

03:29

webengine.dll

4.8.4718.0

20,400

11-Apr-2024

03:29

webengine4.dll

4.8.4718.0

676,288

11-Apr-2024

03:29

webengine4.dll

4.8.4718.0

565,792

11-Apr-2024

03:29

WindowsBase.dll

4.8.4729.0

1,300,400

11-Apr-2024

03:29

WindowsFormsIntegration.dll

4.8.4614.0

102,336

11-Apr-2024

03:29

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

102,672

11-Apr-2024

03:29

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

11-Apr-2024

03:29

WPFFontCache_v0400.exe.mui

4.8.4729.0

13,352

11-Apr-2024

03:59

WPFFontCache_v0400.exe.mui

4.8.4729.0

13,232

11-Apr-2024

03:36

WPFFontCache_v0400.exe

4.8.4729.0

23,096

11-Apr-2024

03:59

WPFFontCache_v0400.exe

4.8.4729.0

20,952

11-Apr-2024

03:36

wpfgfx_v0400.dll

4.8.4729.0

2,052,032

11-Apr-2024

03:29

wpfgfx_v0400.dll

4.8.4729.0

1,620,400

11-Apr-2024

03:36

How to obtain help and support for this update

Meer hulp nodig?

Meer opties?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.