Applies to

  • Windows Server 2012

  • Windows Server 2012 (Server Core installation)

Summary

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) makes sure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.

This update also addresses an elevation of privilege vulnerability that exists when the Windows Modules Installer improperly handles file operations. An attacker who successfully exploited this vulnerability could gain elevated privileges. The security update addresses the vulnerability by ensuring the Windows Modules Installer properly handles file operations. For more information, see CVE-2020-1346 | Windows Modules Installer Elevation of Privilege Vulnerability.

How to get this update

Method 1: Windows Update 

This update is available through Windows Update. It will be downloaded and installed automatically.  

Method 2: Microsoft Update Catalog 

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

Method 3: Windows Server Update Services

This update is also available through Windows Server Update Services (WSUS).

Prerequisites 

There are no prerequisites to apply this update.

Restart information 

You don't have to restart your computer after you apply this update.

Removal information

Servicing stack updates (SSUs) make changes to how updates are installed and cannot be uninstalled from the device.

Update replacement information 

This update replaces the previously released update KB4562252.

File Information


File attributes

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

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

File verification

File hash information

File name

SHA1 hash

SHA256 hash

Windows8-RT-KB4566426-x64.msu

ED3F2C06D774AF0138D4CA3E17B7151CBC5D0FC5

5B8B52C30A1A042E3A4A8F3AD9A913B2F50EF6765DB742DD213FFABDA89DAD98

For all supported x64-based versions

File name

File version

File size

Date

Time

Cbsapi.dll

6.2.9200.16384

23,040

26-Jul-2012

03:05

Esscli.dll

6.2.9200.22865

385,024

17-Aug-2019

17:10

Fastprox.dll

6.2.9200.22865

816,640

17-Aug-2019

17:10

Mofd.dll

6.2.9200.23084

259,584

11-Jun-2020

04:11

Mofinstall.dll

6.2.9200.23084

71,168

11-Jun-2020

04:11

Repdrvfs.dll

6.2.9200.16384

366,080

26-Jul-2012

03:07

Wbemcomn.dll

6.2.9200.22865

462,336

17-Aug-2019

17:10

Wbemcore.dll

6.2.9200.23084

1,207,296

11-Jun-2020

04:11

Wbemprox.dll

6.2.9200.16384

35,840

26-Jul-2012

03:07

Wmicmiplugin.dll

6.2.9200.23060

556,032

15-May-2020

05:35

Wmiutils.dll

6.2.9200.16384

115,712

26-Jul-2012

03:07

Sppinst.dll

6.2.9200.21193

641,024

09-Aug-2014

06:56

Cmifw.dll

6.2.9200.16384

88,576

26-Jul-2012

03:05

Firewallofflineapi.dll

6.2.9200.16384

211,968

26-Jul-2012

03:05

Appserverai.dll

6.2.9200.23084

135,680

11-Jun-2020

04:11

Rdwebai.dll

6.2.9200.22882

126,976

17-Sep-2019

04:31

Tssdisai.dll

6.2.9200.23084

145,408

11-Jun-2020

04:11

Vmhostai.dll

6.2.9200.23084

123,392

11-Jun-2020

04:11

Appxreg.dll

6.2.9200.16384

15,360

26-Jul-2012

03:05

Bcdeditai.dll

6.2.9200.21193

300,032

09-Aug-2014

06:55

Bfsvc.dll

6.2.9200.16384

91,648

26-Jul-2012

03:05

Cbscore.dll

6.2.9200.23084

1,163,776

11-Jun-2020

04:11

Cbsmsg.dll

6.2.9200.16384

41,472

26-Jul-2012

03:05

Ceipfwdai.dll

6.2.9200.23060

212,480

15-May-2020

05:34

Cleanupai.dll

6.2.9200.16384

31,232

26-Jul-2012

03:05

Cmiadapter.dll

6.2.9200.22882

116,736

17-Sep-2019

04:30

Cmipnpinstall.dll

6.2.9200.23084

250,880

11-Jun-2020

04:11

Cmitrust.dll

6.2.9200.22865

407,040

17-Aug-2019

17:10

Cmiv2.dll

6.2.9200.23084

3,298,816

11-Jun-2020

04:11

Cntrtextinstaller.dll

6.2.9200.16384

164,864

26-Jul-2012

03:05

Configureieoptionalcomponentsai.dll

6.2.9200.22882

73,216

17-Sep-2019

04:30

Dpx.dll

6.2.9200.23060

362,496

15-May-2020

05:34

Drupdate.dll

6.2.9200.22865

244,224

17-Aug-2019

17:10

Drvstore.dll

6.2.9200.22865

703,488

17-Aug-2019

17:10

Fveupdateai.dll

6.2.9200.22882

57,344

17-Sep-2019

04:30

Globalinstallorder.xml

Not applicable

2,240,509

02-Jun-2012

20:26

Httpai.dll

6.2.9200.22882

52,224

17-Sep-2019

04:30

Iefileinstallai.dll

6.2.9200.22882

58,880

17-Sep-2019

04:30

Luainstall.dll

6.2.9200.16384

50,176

26-Jul-2012

03:06

Msdelta.dll

6.2.9200.23084

414,208

11-Jun-2020

04:11

Msdtcadvancedinstaller.dll

6.2.9200.23060

239,616

15-May-2020

05:35

Mspatcha.dll

6.2.9200.16384

45,056

26-Jul-2012

03:07

Netfxconfig.dll

6.2.9200.16384

34,304

26-Jul-2012

03:06

Peerdistai.dll

6.2.9200.22882

67,584

17-Sep-2019

04:31

Pkgmgr.exe

6.2.9200.22865

196,096

17-Aug-2019

17:10

Poqexec.exe

6.2.9200.23060

148,480

15-May-2020

05:35

Printadvancedinstaller.dll

6.2.9200.22865

71,168

17-Aug-2019

17:10

Registeriepkeysai.dll

6.2.9200.16384

19,456

26-Jul-2012

03:07

Securebootai.dll

6.2.9200.22882

36,352

17-Sep-2019

04:31

Servicemodelregai.dll

6.2.9200.22882

116,224

17-Sep-2019

04:31

Setieinstalleddateai.dll

6.2.9200.22882

42,496

17-Sep-2019

04:31

Smiengine.dll

6.2.9200.23060

894,464

15-May-2020

05:35

Smipi.dll

6.2.9200.22882

110,592

17-Sep-2019

04:31

Tifilefetcher.exe

6.2.9200.23060

460,800

15-May-2020

05:35

Timezoneai.dll

6.2.9200.16384

75,264

26-Jul-2012

03:07

Tiworker.exe

6.2.9200.21193

189,440

09-Aug-2014

06:57

Wcmtypes.xsd

Not applicable

1,047

02-Jun-2012

14:54

Wcp.dll

6.2.9200.23084

2,835,456

11-Jun-2020

04:11

Wdscore.dll

6.2.9200.22865

272,384

17-Aug-2019

17:10

Winsockai.dll

6.2.9200.16384

60,928

26-Jul-2012

03:07

Wrpint.dll

6.2.9200.16384

60,928

26-Jul-2012

03:08

Ws2_helper.dll

6.2.9200.16384

59,904

26-Jul-2012

03:08

Trustedinstaller.exe

6.2.9200.21193

98,304

09-Aug-2014

06:57

Esscli.dll

6.2.9200.16384

283,648

26-Jul-2012

03:19

Fastprox.dll

6.2.9200.22865

629,248

17-Aug-2019

16:15

Mofd.dll

6.2.9200.23084

196,096

11-Jun-2020

03:15

Mofinstall.dll

6.2.9200.16384

61,440

26-Jul-2012

03:19

Repdrvfs.dll

6.2.9200.16384

274,944

26-Jul-2012

03:19

Wbemcomn.dll

6.2.9200.21193

380,928

09-Aug-2014

06:36

Wbemcore.dll

6.2.9200.23084

924,672

11-Jun-2020

03:15

Wbemprox.dll

6.2.9200.16384

28,160

26-Jul-2012

03:19

Wmicmiplugin.dll

6.2.9200.23084

395,776

11-Jun-2020

03:15

Wmiutils.dll

6.2.9200.16384

88,576

26-Jul-2012

03:19

Sppinst.dll

6.2.9200.21193

518,656

09-Aug-2014

06:36

Cmifw.dll

6.2.9200.16384

73,728

26-Jul-2012

03:18

Firewallofflineapi.dll

6.2.9200.16384

181,760

26-Jul-2012

03:18

Appxreg.dll

6.2.9200.16384

22,016

26-Jul-2012

03:17

Bcdeditai.dll

6.2.9200.21193

285,184

09-Aug-2014

06:35

Bfsvc.dll

6.2.9200.16384

91,136

26-Jul-2012

03:18

Cbscore.dll

6.2.9200.23084

1,008,128

11-Jun-2020

03:15

Cbsmsg.dll

6.2.9200.16384

41,472

26-Jul-2012

03:18

Ceipfwdai.dll

6.2.9200.23060

180,736

15-May-2020

04:38

Cleanupai.dll

6.2.9200.16384

36,352

26-Jul-2012

03:18

Cmiadapter.dll

6.2.9200.22865

103,936

17-Aug-2019

16:15

Cmipnpinstall.dll

6.2.9200.23084

190,976

11-Jun-2020

03:15

Cmitrust.dll

6.2.9200.21913

289,280

23-Jun-2016

01:48

Cmiv2.dll

6.2.9200.23084

2,159,616

11-Jun-2020

03:15

Cntrtextinstaller.dll

6.2.9200.22865

139,776

17-Aug-2019

16:15

Configureieoptionalcomponentsai.dll

6.2.9200.22865

69,632

17-Aug-2019

16:15

Dpx.dll

6.2.9200.22865

250,368

17-Aug-2019

16:15

Drupdate.dll

6.2.9200.23060

193,024

15-May-2020

04:38

Drvstore.dll

6.2.9200.23060

549,376

15-May-2020

04:38

Fveupdateai.dll

6.2.9200.22865

56,320

17-Aug-2019

16:15

Globalinstallorder.xml

Not applicable

2,240,509

02-Jun-2012

20:26

Httpai.dll

6.2.9200.22865

53,760

17-Aug-2019

16:15

Iefileinstallai.dll

6.2.9200.22865

59,904

17-Aug-2019

16:15

Luainstall.dll

6.2.9200.16384

39,424

26-Jul-2012

03:18

Msdelta.dll

6.2.9200.23084

310,784

11-Jun-2020

03:15

Msdtcadvancedinstaller.dll

6.2.9200.23060

200,704

15-May-2020

04:38

Mspatcha.dll

6.2.9200.16384

38,912

26-Jul-2012

03:19

Netfxconfig.dll

6.2.9200.16384

40,448

26-Jul-2012

03:19

Peerdistai.dll

6.2.9200.22865

66,048

17-Aug-2019

16:15

Pkgmgr.exe

6.2.9200.22865

194,048

17-Aug-2019

16:15

Poqexec.exe

6.2.9200.22903

132,608

11-Oct-2019

15:17

Printadvancedinstaller.dll

6.2.9200.23060

72,704

15-May-2020

04:38

Registeriepkeysai.dll

6.2.9200.16384

24,576

26-Jul-2012

03:19

Securebootai.dll

6.2.9200.22882

39,936

17-Sep-2019

03:35

Servicemodelregai.dll

6.2.9200.23060

96,768

15-May-2020

04:38

Setieinstalleddateai.dll

6.2.9200.22865

41,984

17-Aug-2019

16:15

Smiengine.dll

6.2.9200.23060

700,928

15-May-2020

04:38

Smipi.dll

6.2.9200.22865

102,400

17-Aug-2019

16:15

Tifilefetcher.exe

6.2.9200.23060

380,928

15-May-2020

04:38

Timezoneai.dll

6.2.9200.21193

67,584

09-Aug-2014

06:36

Tiworker.exe

6.2.9200.21193

186,880

09-Aug-2014

06:37

Wcmtypes.xsd

Not applicable

1,047

02-Jun-2012

14:54

Wcp.dll

6.2.9200.23084

2,187,776

11-Jun-2020

03:15

Wdscore.dll

6.2.9200.22865

225,792

17-Aug-2019

16:15

Winsockai.dll

6.2.9200.16384

64,512

26-Jul-2012

03:20

Wrpint.dll

6.2.9200.21193

48,640

09-Aug-2014

06:36

Ws2_helper.dll

6.2.9200.16384

48,128

26-Jul-2012

03:20

References

For information on SSUs, see the following articles:

Learn about the terminology that Microsoft uses to describe software updates.

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