Description of the security update for Word 2016: April 13, 2021 (KB4493198)

Summary

This security update resolves a Microsoft Word remote code execution vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-28453.

Note: To apply this security update, you must have the release version of Microsoft Office 2016 installed on the computer.

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home (see What version of Office am I using?). 

Improvements and fixes

Group Policy templates have been updated for Office applications. This update enables Word to support the new templates. After you install this update, the following settings are turned on by default:

  • Stop checking for table alt text accessibility information

  • Stop checking to ensure hyperlink text is meaningful

  • Stop checking to ensure hyperlink text extension is meaningful if they include extensions

  • Stop checking for blank table rows and columns

  • Stop checking to ensure headings are succinct

  • Stop checking whether blank characters are used for formatting

  • Stop checking for image watermarks

  • Stop checking to ensure styles have been used frequently

  • Stop checking to ensure heading styles do not skip style level

How to get and install the update

Method 1: Microsoft Update

This update is available from Microsoft Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to get security updates automatically, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

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

Method 3: Microsoft Download Center

You can get the standalone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

More information

Security update deployment information

For deployment information about this update, see Security update deployment information: April 13, 2021.

Security update replacement information

This security update replaces previously released security update 4493156.

File hash information

File name

SHA1 hash

SHA256 hash

word2016-kb4493198-fullfile-x86-glb.exe

D56475AC15B7CF99D75BD922F53AE83E75E4401C

DAFFA6B5F49F8AF982FA84D2BF2378A408DA9D5B14571A03721A1867863A4F9E

word2016-kb4493198-fullfile-x64-glb.exe

15EC3948335DD395456CF39299CEEDDC1EA25985

753CC0472E503F71D58F94E1D87CFE7505C2A5638894EECC183B8A241326FDC5

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and 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 times may change when you perform certain operations on the files.

File identifier

File name

File version

File size

Date

Time

genko.dll

genko.dll

16.0.5032.1000

402264

16-Mar-21

06:36

wwintl.dll_1025

wwintl.dll

16.0.4936.1000

823584

23-Mar-21

07:15

wwintl.dll_1026

wwintl.dll

16.0.4936.1000

820504

23-Mar-21

07:15

wwintl.dll_1029

wwintl.dll

16.0.4936.1000

876320

23-Mar-21

07:15

wwintl.dll_1030

wwintl.dll

16.0.4936.1000

807712

23-Mar-21

07:15

wwintl.dll_1031

wwintl.dll

16.0.4936.1000

888088

23-Mar-21

07:15

wwintl.dll_1032

wwintl.dll

16.0.4936.1000

877856

23-Mar-21

07:15

wwintl.dll_3082

wwintl.dll

16.0.4936.1000

847648

23-Mar-21

07:15

wwintl.dll_1061

wwintl.dll

16.0.4936.1000

770840

23-Mar-21

07:15

wwintl.dll_1035

wwintl.dll

16.0.4936.1000

818464

23-Mar-21

07:16

wwintl.dll_1036

wwintl.dll

16.0.4936.1000

883992

23-Mar-21

07:16

wwintl.dll_1037

wwintl.dll

16.0.4936.1000

762144

23-Mar-21

07:16

wwintl.dll_1081

wwintl.dll

16.0.4936.1000

865056

23-Mar-21

07:16

wwintl.dll_1050

wwintl.dll

16.0.4936.1000

830744

23-Mar-21

07:16

wwintl.dll_1038

wwintl.dll

16.0.4936.1000

886560

23-Mar-21

07:16

wwintl.dll_1057

wwintl.dll

16.0.4936.1000

779040

23-Mar-21

07:16

wwintl.dll_1040

wwintl.dll

16.0.4936.1000

838424

23-Mar-21

07:16

wwintl.dll_1041

wwintl.dll

16.0.4936.1000

790304

23-Mar-21

07:15

wwintl.dll_1087

wwintl.dll

16.0.4936.1000

880408

23-Mar-21

07:16

wwintl.dll_1042

wwintl.dll

16.0.4936.1000

783136

23-Mar-21

07:16

wwintl.dll_1063

wwintl.dll

16.0.4936.1000

836896

23-Mar-21

07:16

wwintl.dll_1062

wwintl.dll

16.0.4936.1000

824608

23-Mar-21

07:16

wwintl.dll_1086

wwintl.dll

16.0.4936.1000

782616

23-Mar-21

07:16

wwintl.dll_1044

wwintl.dll

16.0.4936.1000

797168

23-Mar-21

07:16

wwintl.dll_1043

wwintl.dll

16.0.4936.1000

835872

23-Mar-21

07:16

wwintl.dll_1045

wwintl.dll

16.0.4936.1000

852256

23-Mar-21

07:16

wwintl.dll_1046

wwintl.dll

16.0.4936.1000

853280

23-Mar-21

07:16

wwintl.dll_2070

wwintl.dll

16.0.4936.1000

861464

23-Mar-21

07:16

wwintl.dll_1048

wwintl.dll

16.0.4936.1000

896280

23-Mar-21

07:16

wwintl.dll_1049

wwintl.dll

16.0.4936.1000

809968

23-Mar-21

07:16

wwintl.dll_1051

wwintl.dll

16.0.4936.1000

891160

23-Mar-21

07:16

wwintl.dll_1060

wwintl.dll

16.0.4936.1000

821768

23-Mar-21

07:16

wwintl.dll_2074

wwintl.dll

16.0.4936.1000

817944

23-Mar-21

07:16

wwintl.dll_9242

wwintl.dll

16.0.4936.1000

817952

23-Mar-21

07:16

wwintl.dll_1053

wwintl.dll

16.0.4936.1000

803616

23-Mar-21

07:16

wwintl.dll_1054

wwintl.dll

16.0.4936.1000

825112

23-Mar-21

07:16

wwintl.dll_1055

wwintl.dll

16.0.4936.1000

881952

23-Mar-21

07:16

wwintl.dll_1058

wwintl.dll

16.0.4936.1000

820000

23-Mar-21

07:16

wwintl.dll_1066

wwintl.dll

16.0.4936.1000

912672

23-Mar-21

07:16

wwintl.dll_2052

wwintl.dll

16.0.4936.1000

697120

23-Mar-21

07:16

wwintl.dll_1028

wwintl.dll

16.0.4936.1000

706240

23-Mar-21

07:16

jrpcard20.dll_1041

jrpcard20.dll

16.0.4834.1000

330960

16-Mar-21

06:36

pdfreflow.exe

pdfreflow.exe

16.0.5140.1000

10306344

16-Mar-21

06:34

wwintl.dll_1033

wwintl.dll

16.0.4936.1000

701152

16-Mar-21

06:33

msword.olb

msword.olb

939304

16-Mar-21

06:34

winword.exe

winword.exe

16.0.5149.1000

1937232

24-Mar-21

12:00

wrd12cnv.dll

wordcnv.dll

16.0.5149.1000

9135432

24-Mar-21

12:00

wwlib.dll

wwlib.dll

16.0.5149.1000

28916560

24-Mar-21

12:00

File identifier

File name

File version

File size

Date

Time

calligra.dll

calligra.dll

16.0.4528.1000

338688

23-Mar-21

07:33

genko.dll

genko.dll

16.0.5032.1000

513368

16-Mar-21

06:39

wdsrv.conversion.word.wwintl.dll_1025

wwintl.dll

16.0.5149.1000

944400

23-Mar-21

11:56

wwintl.dll_1025

wwintl.dll

16.0.5149.1000

944400

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1026

wwintl.dll

16.0.5149.1000

899352

23-Mar-21

11:56

wwintl.dll_1026

wwintl.dll

16.0.5149.1000

899352

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1029

wwintl.dll

16.0.5149.1000

955680

23-Mar-21

11:56

wwintl.dll_1029

wwintl.dll

16.0.5149.1000

955680

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1030

wwintl.dll

16.0.5149.1000

886560

23-Mar-21

11:56

wwintl.dll_1030

wwintl.dll

16.0.5149.1000

886560

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1031

wwintl.dll

16.0.5149.1000

966936

23-Mar-21

11:56

wwintl.dll_1031

wwintl.dll

16.0.5149.1000

966936

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1032

wwintl.dll

16.0.5149.1000

956696

23-Mar-21

11:56

wwintl.dll_1032

wwintl.dll

16.0.5149.1000

956696

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_3082

wwintl.dll

16.0.5149.1000

926512

23-Mar-21

11:56

wwintl.dll_3082

wwintl.dll

16.0.5149.1000

926512

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1061

wwintl.dll

16.0.5149.1000

849688

23-Mar-21

11:56

wwintl.dll_1061

wwintl.dll

16.0.5149.1000

849688

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1035

wwintl.dll

16.0.5149.1000

897304

23-Mar-21

11:56

wwintl.dll_1035

wwintl.dll

16.0.5149.1000

897304

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1036

wwintl.dll

16.0.5149.1000

962840

23-Mar-21

11:56

wwintl.dll_1036

wwintl.dll

16.0.5149.1000

962840

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1037

wwintl.dll

16.0.5149.1000

882968

23-Mar-21

11:56

wwintl.dll_1037

wwintl.dll

16.0.5149.1000

882968

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1081

wwintl.dll

16.0.5149.1000

944408

23-Mar-21

11:56

wwintl.dll_1081

wwintl.dll

16.0.5149.1000

944408

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1050

wwintl.dll

16.0.5149.1000

909592

23-Mar-21

11:56

wwintl.dll_1050

wwintl.dll

16.0.5149.1000

909592

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1038

wwintl.dll

16.0.5149.1000

965424

23-Mar-21

11:56

wwintl.dll_1038

wwintl.dll

16.0.5149.1000

965424

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1057

wwintl.dll

16.0.5149.1000

857888

23-Mar-21

11:56

wwintl.dll_1057

wwintl.dll

16.0.5149.1000

857888

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1040

wwintl.dll

16.0.5149.1000

917272

23-Mar-21

11:56

wwintl.dll_1040

wwintl.dll

16.0.5149.1000

917272

23-Mar-21

11:56

wac.word.wwintl.dll_1041

wwintl.dll

16.0.5149.1000

869144

wdsrv.conversion.word.wwintl.dll_1041

wwintl.dll

16.0.5149.1000

869144

23-Mar-21

11:56

wwintl.dll_1041

wwintl.dll

16.0.5149.1000

869144

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1087

wwintl.dll

16.0.5149.1000

959776

23-Mar-21

11:56

wwintl.dll_1087

wwintl.dll

16.0.5149.1000

959776

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1042

wwintl.dll

16.0.5149.1000

862488

23-Mar-21

11:56

wwintl.dll_1042

wwintl.dll

16.0.5149.1000

862488

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1063

wwintl.dll

16.0.5149.1000

916256

23-Mar-21

11:56

wwintl.dll_1063

wwintl.dll

16.0.5149.1000

916256

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1062

wwintl.dll

16.0.5149.1000

903448

23-Mar-21

11:56

wwintl.dll_1062

wwintl.dll

16.0.5149.1000

903448

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1086

wwintl.dll

16.0.5149.1000

861976

23-Mar-21

11:56

wwintl.dll_1086

wwintl.dll

16.0.5149.1000

861976

23-Mar-21

11:56

wdsrv.conversion.word.wwintl.dll_1044

wwintl.dll

16.0.5149.1000

875792

23-Mar-21

11:57

wwintl.dll_1044

wwintl.dll

16.0.5149.1000

875792

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1043

wwintl.dll

16.0.5149.1000

915232

23-Mar-21

11:57

wwintl.dll_1043

wwintl.dll

16.0.5149.1000

915232

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1045

wwintl.dll

16.0.5149.1000

931608

23-Mar-21

11:57

wwintl.dll_1045

wwintl.dll

16.0.5149.1000

931608

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1046

wwintl.dll

16.0.5149.1000

932624

23-Mar-21

11:57

wwintl.dll_1046

wwintl.dll

16.0.5149.1000

932624

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_2070

wwintl.dll

16.0.5149.1000

940320

23-Mar-21

11:57

wwintl.dll_2070

wwintl.dll

16.0.5149.1000

940320

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1048

wwintl.dll

16.0.5149.1000

975640

23-Mar-21

11:57

wwintl.dll_1048

wwintl.dll

16.0.5149.1000

975640

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1049

wwintl.dll

16.0.5149.1000

888600

23-Mar-21

11:57

wwintl.dll_1049

wwintl.dll

16.0.5149.1000

888600

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1051

wwintl.dll

16.0.5149.1000

970528

23-Mar-21

11:57

wwintl.dll_1051

wwintl.dll

16.0.5149.1000

970528

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1060

wwintl.dll

16.0.5149.1000

900384

23-Mar-21

11:57

wwintl.dll_1060

wwintl.dll

16.0.5149.1000

900384

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_2074

wwintl.dll

16.0.5149.1000

896792

23-Mar-21

11:57

wwintl.dll_2074

wwintl.dll

16.0.5149.1000

896792

23-Mar-21

11:57

wac.word.wwintl.dll_9242

wwintl.dll

16.0.5149.1000

896792

wdsrv.conversion.word.wwintl.dll_9242

wwintl.dll

16.0.5149.1000

896792

23-Mar-21

11:57

wwintl.dll_9242

wwintl.dll

16.0.5149.1000

896792

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1053

wwintl.dll

16.0.5149.1000

882456

23-Mar-21

11:57

wwintl.dll_1053

wwintl.dll

16.0.5149.1000

882456

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1054

wwintl.dll

16.0.5149.1000

903968

23-Mar-21

11:57

wwintl.dll_1054

wwintl.dll

16.0.5149.1000

903968

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1055

wwintl.dll

16.0.5149.1000

960792

23-Mar-21

11:57

wwintl.dll_1055

wwintl.dll

16.0.5149.1000

960792

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1058

wwintl.dll

16.0.5149.1000

898848

23-Mar-21

11:57

wwintl.dll_1058

wwintl.dll

16.0.5149.1000

898848

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1066

wwintl.dll

16.0.5149.1000

992024

23-Mar-21

11:57

wwintl.dll_1066

wwintl.dll

16.0.5149.1000

992024

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_2052

wwintl.dll

16.0.5149.1000

775968

23-Mar-21

11:57

wwintl.dll_2052

wwintl.dll

16.0.5149.1000

775968

23-Mar-21

11:57

wdsrv.conversion.word.wwintl.dll_1028

wwintl.dll

16.0.5149.1000

784672

23-Mar-21

11:57

wwintl.dll_1028

wwintl.dll

16.0.5149.1000

784672

23-Mar-21

11:57

jrpcard20.dll_1041

jrpcard20.dll

16.0.4834.1000

331168

16-Mar-21

06:39

pdfreflow.exe

pdfreflow.exe

16.0.5140.1000

15919968

16-Mar-21

06:38

wac.word.wwintl.dll_1033

wwintl.dll

16.0.4936.1000

780488

wdsrv.conversion.word.wwintl.dll_1033

wwintl.dll

16.0.4936.1000

780488

16-Mar-21

06:33

wwintl.dll_1033

wwintl.dll

16.0.4936.1000

780488

16-Mar-21

06:33

msword.olb

msword.olb

939304

16-Mar-21

06:38

winword.exe

winword.exe

16.0.5149.1000

1940784

23-Mar-21

11:59

wrd12cnv.dll

wordcnv.dll

16.0.5149.1000

11890456

23-Mar-21

11:59

wwlib.dll

wwlib.dll

16.0.5149.1000

37252416

23-Mar-21

11:59

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