Applies to:

Microsoft .NET Framework 4.8

Summary

A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly. An attacker who successfully exploited this vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

To learn more about the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE).

Important

  • As a reminder to advanced IT administrators, updates to .NET Framework 3.5 for Windows 8.1 and Windows Server 2012 R2 should only be applied on systems where .NET Framework 3.5 is present and enabled. Customers who attempt to pre-install updates to .NET Framework 3.5 to offline images that do not contain the .NET Framework 3.5 product enabled will expose these systems to failures to enable .NET Framework 3.5 after the systems are online. For more extensive information about deploying .NET Framework 3.5, see Microsoft .NET Framework 3.5 Deployment Considerations.

  • All updates for Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2 require that update KB 2919355 is installed. We recommend that you install update KB 2919355 on your Windows 8.1-based, Windows RT 8.1-based, or Windows Server 2012 R2-based computer so that you receive updates in the future.

  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Additional information about this update

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

  • 4534978 Description of the Security Only Update for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 8.1 and Windows Server 2012 R2 (KB4534978)

How to obtain and install the update

Method 1: Microsoft Update Catalog

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

Method 2: Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

  1. Select Start, select Administrative Tools, and then select Microsoft Windows Server Update Services 3.0.

  2. Expand ComputerName, and then select Action.

  3. Select Import Updates.

  4. WSUS opens a browser window in which you may be prompted to install an ActiveX control. You must install the ActiveX control to continue.

  5. After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Type 4534978 into the Search box, and then select Search.

  6. Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Select Add to add them to your basket.

  7. After you select all the packages that you require, select View Basket.

  8. To import the packages to your WSUS server, select Import.

  9. After the packages are imported, select Close to return to WSUS.

The updates are now available for installation through WSUS.

Update deployment information

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

20200114 Security update deployment information: January 14, 2020

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.


File information
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2 file information

Note: The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

File information

File hash information

File name

SHA1 hash

SHA256 hash

Windows8.1-KB4532951-x64-NDP48.msu

91C6A0BE6F735D3720C8A9FD9495EE65DB39C169

A0A44D04C2F932334B1D943FA063081A2F0165E334A4717B23673E4814CE64EE

Windows8.1-KB4532951-x86-NDP48.msu

E4F7A1DF7A354054884B7B70CD1F18B627469C9B

10F6E028717607CF92CC5BD3299C4B8AB625E73402734882700C8AC720753B99

Windows8.1-KB4532951-arm-NDP48.msu

2FC7588BA3EAFDBD56C89FCC1D99B966AEEE8900

D71F6719BDBA99839F28D4D9DDBE2AF4D1320F94170611F0B21BE1C7B756FA42

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

Globalmonospace.compositefont

Not applicable

26,040

08-Nov-2019

23:44

Not applicable

SPA

AMD64_NETFX4-GLOBALMONOSP

Globalsansserif.compositefont

Not applicable

26,489

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

08-Nov-2019

23:44

Not applicable

None

Not applicable

Penimc.dll

14.8.4110.0

19,224

04-Dec-2019

02:54

x64

None

Not applicable

Penimc2_v0400.dll

4.8.4110.0

128,280

04-Dec-2019

02:54

x64

None

Not applicable

Penimc_v0400.dll

4.8.4110.0

27,920

04-Dec-2019

02:54

x64

None

Not applicable

Presentationframework-systemdata.dll

4.8.4110.0

25,576

04-Dec-2019

02:55

x86

None

Not applicable

Presentationframework.dll

4.8.4110.0

6,269,720

04-Dec-2019

02:55

x86

None

Not applicable

Presentationhost_v0400.dll.mui

4.8.4110.0

85,272

04-Dec-2019

02:54

Not applicable

None

Not applicable

Presentationhost_v0400.dll

4.8.4110.0

310,040

04-Dec-2019

02:54

x64

None

Not applicable

Presentationnative_v0400.dll

4.8.4110.0

1,171,736

04-Dec-2019

02:54

x64

None

Not applicable

Reachframework.dll

4.8.4110.0

677,656

04-Dec-2019

02:55

x86

None

Not applicable

System.core.dll

4.8.4110.0

1,556,616

04-Dec-2019

02:55

x86

None

Not applicable

System.windows.controls.ribbon.dll

4.8.4110.0

748,032

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.activities.dll

4.8.4110.0

1,051,112

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.componentmodel.dll

4.8.4110.0

1,557,272

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.runtime.dll

4.8.4110.0

503,064

04-Dec-2019

02:55

x86

None

Not applicable

System.xaml.dll

4.8.4110.0

640,048

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationclientsideproviders.dll

4.8.4110.0

361,752

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationclient.dll

4.8.4110.0

178,456

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationprovider.dll

4.8.4110.0

49,432

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationtypes.dll

4.8.4110.0

223,512

04-Dec-2019

02:55

x86

None

Not applicable

Windowsbase.dll

4.8.4110.0

1,306,392

04-Dec-2019

02:55

x86

None

Not applicable

Workflowservicehostperformancecounters.dll

4.8.4110.0

102,672

04-Dec-2019

02:54

x64

None

Not applicable

Wpfgfx_v0400.dll

4.8.4110.0

2,058,008

04-Dec-2019

02:54

x64

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

08-Nov-2019

23:40

Not applicable

None

Not applicable

Globalsansserif.compositefont

Not applicable

26,489

08-Nov-2019

23:40

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

08-Nov-2019

23:40

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

08-Nov-2019

23:40

Not applicable

None

Not applicable

Presentationcore.dll

4.8.4110.0

3,653,400

04-Dec-2019

02:54

x64

None

Not applicable

System.printing.dll

4.8.4110.0

400,152

04-Dec-2019

02:54

x64

None

Not applicable

Presentationframework-systemdata.dll

4.8.4110.0

25,576

04-Dec-2019

02:55

x86

None

Not applicable

Presentationframework.dll

4.8.4110.0

6,269,720

04-Dec-2019

02:55

x86

None

Not applicable

Reachframework.dll

4.8.4110.0

677,656

04-Dec-2019

02:55

x86

None

Not applicable

System.core.dll

4.8.4110.0

1,556,616

04-Dec-2019

02:55

x86

None

Not applicable

System.windows.controls.ribbon.dll

4.8.4110.0

748,032

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.activities.dll

4.8.4110.0

1,051,112

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.componentmodel.dll

4.8.4110.0

1,557,272

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.runtime.dll

4.8.4110.0

503,064

04-Dec-2019

02:55

x86

None

Not applicable

System.xaml.dll

4.8.4110.0

640,048

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationclientsideproviders.dll

4.8.4110.0

361,752

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationclient.dll

4.8.4110.0

178,456

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationprovider.dll

4.8.4110.0

49,432

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationtypes.dll

4.8.4110.0

223,512

04-Dec-2019

02:55

x86

None

Not applicable

Windowsbase.dll

4.8.4110.0

1,306,392

04-Dec-2019

02:55

x86

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

08-Nov-2019

23:44

Not applicable

SPA

X86_NETFX4-GLOBALMONOSP

Globalsansserif.compositefont

Not applicable

26,489

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

08-Nov-2019

23:44

Not applicable

None

Not applicable

Penimc.dll

14.8.4110.0

19,216

04-Dec-2019

02:55

x86

None

Not applicable

Penimc2_v0400.dll

4.8.4110.0

107,288

04-Dec-2019

02:55

x86

None

Not applicable

Penimc_v0400.dll

4.8.4110.0

25,880

04-Dec-2019

02:55

x86

None

Not applicable

Presentationhost_v0400.dll.mui

4.8.4110.0

85,264

04-Dec-2019

02:55

Not applicable

None

Not applicable

Presentationhost_v0400.dll

4.8.4110.0

241,432

04-Dec-2019

02:55

x86

None

Not applicable

Presentationnative_v0400.dll

4.8.4110.0

930,584

04-Dec-2019

02:55

x86

None

Not applicable

System.core.dll

4.8.4110.0

1,556,616

04-Dec-2019

02:55

x86

None

Not applicable

Workflowservicehostperformancecounters.dll

4.8.4110.0

89,368

04-Dec-2019

02:55

x86

None

Not applicable

Wpfgfx_v0400.dll

4.8.4110.0

1,626,392

04-Dec-2019

02:55

x86

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globalsansserif.compositefont

Not applicable

26,489

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

08-Nov-2019

23:44

Not applicable

None

Not applicable

Presentationcore.dll

4.8.4110.0

3,676,952

04-Dec-2019

02:55

x86

None

Not applicable

System.printing.dll

4.8.4110.0

399,640

04-Dec-2019

02:55

x86

None

Not applicable

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

Presentationframework-systemdata.dll

4.8.4110.0

25,576

04-Dec-2019

02:55

x86

None

Not applicable

Presentationframework.dll

4.8.4110.0

6,269,720

04-Dec-2019

02:55

x86

None

Not applicable

Reachframework.dll

4.8.4110.0

677,656

04-Dec-2019

02:55

x86

None

Not applicable

System.core.dll

4.8.4110.0

1,556,616

04-Dec-2019

02:55

x86

None

Not applicable

System.windows.controls.ribbon.dll

4.8.4110.0

748,032

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.activities.dll

4.8.4110.0

1,051,112

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.componentmodel.dll

4.8.4110.0

1,557,272

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.runtime.dll

4.8.4110.0

503,064

04-Dec-2019

02:55

x86

None

Not applicable

System.xaml.dll

4.8.4110.0

640,048

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationclientsideproviders.dll

4.8.4110.0

361,752

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationclient.dll

4.8.4110.0

178,456

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationprovider.dll

4.8.4110.0

49,432

04-Dec-2019

02:55

x86

None

Not applicable

Uiautomationtypes.dll

4.8.4110.0

223,512

04-Dec-2019

02:55

x86

None

Not applicable

Windowsbase.dll

4.8.4110.0

1,306,392

04-Dec-2019

02:55

x86

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

08-Nov-2019

23:44

Not applicable

SPA

X86_NETFX4-GLOBALMONOSP

Globalsansserif.compositefont

Not applicable

26,489

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

08-Nov-2019

23:44

Not applicable

None

Not applicable

Penimc.dll

14.8.4110.0

19,216

04-Dec-2019

02:55

x86

None

Not applicable

Penimc2_v0400.dll

4.8.4110.0

107,288

04-Dec-2019

02:55

x86

None

Not applicable

Penimc_v0400.dll

4.8.4110.0

25,880

04-Dec-2019

02:55

x86

None

Not applicable

Presentationhost_v0400.dll.mui

4.8.4110.0

85,264

04-Dec-2019

02:55

Not applicable

None

Not applicable

Presentationhost_v0400.dll

4.8.4110.0

241,432

04-Dec-2019

02:55

x86

None

Not applicable

Presentationnative_v0400.dll

4.8.4110.0

930,584

04-Dec-2019

02:55

x86

None

Not applicable

System.core.dll

4.8.4110.0

1,556,616

04-Dec-2019

02:55

x86

None

Not applicable

Workflowservicehostperformancecounters.dll

4.8.4110.0

89,368

04-Dec-2019

02:55

x86

None

Not applicable

Wpfgfx_v0400.dll

4.8.4110.0

1,626,392

04-Dec-2019

02:55

x86

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globalsansserif.compositefont

Not applicable

26,489

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

08-Nov-2019

23:44

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

08-Nov-2019

23:44

Not applicable

None

Not applicable

Presentationcore.dll

4.8.4110.0

3,676,952

04-Dec-2019

02:55

x86

None

Not applicable

System.printing.dll

4.8.4110.0

399,640

04-Dec-2019

02:55

x86

None

Not applicable

For all supported ARM-based versions

File name

File version

File size

Date

Time

Platform

System.core.dll

4.8.4110.0

1,556,616

04-Dec-2019

02:55

x86

Workflowservicehostperformancecounters.dll

4.8.4110.0

76,960

04-Dec-2019

02:52

Not applicable

System.core.dll

4.8.4110.0

1,556,616

04-Dec-2019

02:55

x86

System.xaml.dll

4.8.4110.0

640,048

04-Dec-2019

02:55

x86

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