Security Only Update for .NET Framework 4.5.2 for Windows 8.1 and Server 2012 R2 (KB4495589)

Applies to:

Microsoft .NET Framework 4.5.2

Summary

Denial of service vulnerabilities exist when .NET Framework improperly handles objects in heap memory, or when .NET Framework and .NET Core improperly process RegEx strings.

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

Important

  • 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

For more information about this update as it relates to its particular Windows version(s), see the following article(s) in the Microsoft Knowledge Base:.

  • 4498963 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 Server 2012 R2 (KB4498963)

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.

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 4498963 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:

20190514 Security update deployment information: February 12, 2019

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 4481485.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

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-KB4495589-x64.msu

AF4B3F4051DCA2B765BE11DB8A1A64EB96BFFFAC

3D90AAE7DB4593B22BFEAEDEA987D4F65E19C8786B1A3E4151CF7F32CAEC1955

Windows8.1-KB4495589-x86.msu

958412987CB0A991D0ED19620A2DD7821215EC21

0991595EB4BFB5DB1FB9ABB086DA316EF42940CD85E73421EDF5A85D6029C61B

Windows8.1-KB4495589-arm.msu

93CE39D2DB0358305BD438A9E4CECB3A5AE41A6D

D9A3EAF1E9E09C251D0CE4E6939802C869A88B6F09ADCC5131913A2EC91E13CC

For all supported x64-based versions

File name

File version

File size

Date

Time

mscorlib.dll

4.0.30319.36543

5,221,936

31-Mar-2019

16:36

normidna.nlp

59,342

26-Oct-2017

14:35

normnfc.nlp

47,076

26-Oct-2017

14:35

normnfd.nlp

40,566

26-Oct-2017

14:35

normnfkc.nlp

67,808

26-Oct-2017

14:35

normnfkd.nlp

61,718

26-Oct-2017

14:35

clrjit.dll

4.0.30319.36543

1,234,480

31-Mar-2019

16:36

clr.dll

4.0.30319.36543

10,070,064

31-Mar-2019

16:36

mscordacwks.dll

4.0.30319.36543

1,731,112

31-Mar-2019

16:36

mscordbi.dll

4.0.30319.36543

1,533,488

31-Mar-2019

16:36

mscorlib.ni.dll

4.0.30319.36543

22,691,096

31-Mar-2019

16:36

msvcp120_clr0400.dll

12.0.52543.36543

678,448

31-Mar-2019

16:36

msvcr120_clr0400.dll

12.0.52543.36543

869,424

31-Mar-2019

16:36

peverify.dll

4.0.30319.36543

225,840

31-Mar-2019

16:36

sos.dll

4.0.30319.36543

822,832

31-Mar-2019

16:36

system.dll

4.0.30319.36543

3,493,280

31-Mar-2019

16:36

system.dll

4.0.30319.36543

3,493,280

30-Mar-2019

13:15

mscorlib.dll

4.0.30319.36543

5,268,016

30-Mar-2019

13:15

normidna.nlp

59,342

08-Nov-2017

15:14

normnfc.nlp

47,076

08-Nov-2017

15:14

normnfd.nlp

40,566

08-Nov-2017

15:14

normnfkc.nlp

67,808

08-Nov-2017

15:14

normnfkd.nlp

61,718

08-Nov-2017

15:14

clrjit.dll

4.0.30319.36543

508,976

30-Mar-2019

13:15

clr.dll

4.0.30319.36543

6,938,160

30-Mar-2019

13:15

mscordacwks.dll

4.0.30319.36543

1,284,144

30-Mar-2019

13:15

mscordbi.dll

4.0.30319.36543

1,107,504

30-Mar-2019

13:15

mscorlib.ni.dll

4.0.30319.36543

17,235,496

30-Mar-2019

13:15

msvcp120_clr0400.dll

12.0.52543.36543

536,624

30-Mar-2019

13:15

msvcr120_clr0400.dll

12.0.52543.36543

875,568

30-Mar-2019

13:15

peverify.dll

4.0.30319.36543

163,888

30-Mar-2019

13:15

sos.dll

4.0.30319.36543

762,416

30-Mar-2019

13:15

For all supported x86-based versions

File name

File version

File size

Date

Time

system.dll

4.0.30319.36543

3,493,280

30-Mar-2019

13:15

mscorlib.dll

4.0.30319.36543

5,268,016

30-Mar-2019

13:15

normidna.nlp

59,342

08-Nov-2017

15:14

normnfc.nlp

47,076

08-Nov-2017

15:14

normnfd.nlp

40,566

08-Nov-2017

15:14

normnfkc.nlp

67,808

08-Nov-2017

15:14

normnfkd.nlp

61,718

08-Nov-2017

15:14

clrjit.dll

4.0.30319.36543

508,976

30-Mar-2019

13:15

clr.dll

4.0.30319.36543

6,938,160

30-Mar-2019

13:15

mscordacwks.dll

4.0.30319.36543

1,284,144

30-Mar-2019

13:15

mscordbi.dll

4.0.30319.36543

1,107,504

30-Mar-2019

13:15

mscorlib.ni.dll

4.0.30319.36543

17,235,496

30-Mar-2019

13:15

msvcp120_clr0400.dll

12.0.52543.36543

536,624

30-Mar-2019

13:15

msvcr120_clr0400.dll

12.0.52543.36543

875,568

30-Mar-2019

13:15

peverify.dll

4.0.30319.36543

163,888

30-Mar-2019

13:15

sos.dll

4.0.30319.36543

762,416

30-Mar-2019

13:15

For all supported arm-based versions

File name

File version

File size

Date

Time

mscorlib.dll

4.0.30319.36543

5,269,696

31-Mar-2019

16:36

normidna.nlp

59,342

09-Aug-2018

13:17

normnfc.nlp

47,076

09-Aug-2018

13:17

normnfd.nlp

40,566

09-Aug-2018

13:17

normnfkc.nlp

67,808

09-Aug-2018

13:17

normnfkd.nlp

61,718

09-Aug-2018

13:17

clrjit.dll

4.0.30319.36543

625,400

31-Mar-2019

16:36

clr.dll

4.0.30319.36543

7,099,368

31-Mar-2019

16:36

mscordacwks.dll

4.0.30319.36543

1,305,344

31-Mar-2019

16:36

mscordbi.dll

4.0.30319.36543

1,120,208

31-Mar-2019

16:36

mscorlib.ni.dll

4.0.30319.36543

17,567,488

31-Mar-2019

16:36

msvcp120_clr0400.dll

12.0.52543.36543

601,856

31-Mar-2019

16:37

msvcr120_clr0400.dll

12.0.52543.36543

634,320

31-Mar-2019

16:37

sos.dll

4.0.30319.36543

666,576

31-Mar-2019

16:36

system.dll

4.0.30319.36543

3,493,280

31-Mar-2019

16:37

Information about protection and security

Need more help?

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

Was this information helpful?

Thank you for your feedback!

Thank you for your feedback! It sounds like it might be helpful to connect you to one of our Office support agents.

×