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-2021-34452.

Note: To apply this security update, you must have the release version of Microsoft Word 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?). 

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: July 13, 2021.

Security update replacement information

This security update replaces previously released security update 5001919.

File hash information

File name

SHA256 hash

word2016-kb5001949-fullfile-x86-glb.exe

A40E158286E32663AE7BE708CF59D71F1A7F3DCDBDF0C9C9A76ECB66E472BC50

word2016-kb5001949-fullfile-x64-glb.exe

0758F50AADE95E6ABF99FA945D63A48506883E775F6E15E9FCFACD7502C8851E

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

15-Jun-21

08:22

wwintl.dll_1025

wwintl.dll

16.0.4936.1000

823584

16-Jun-21

11:11

wwintl.dll_1026

wwintl.dll

16.0.4936.1000

820504

16-Jun-21

11:11

wwintl.dll_1029

wwintl.dll

16.0.4936.1000

876320

16-Jun-21

11:11

wwintl.dll_1030

wwintl.dll

16.0.4936.1000

807712

16-Jun-21

11:11

wwintl.dll_1031

wwintl.dll

16.0.4936.1000

888088

16-Jun-21

11:11

wwintl.dll_1032

wwintl.dll

16.0.4936.1000

877856

16-Jun-21

11:11

wwintl.dll_3082

wwintl.dll

16.0.4936.1000

847648

16-Jun-21

11:11

wwintl.dll_1061

wwintl.dll

16.0.4936.1000

770840

16-Jun-21

11:11

wwintl.dll_1035

wwintl.dll

16.0.4936.1000

818464

16-Jun-21

11:11

wwintl.dll_1036

wwintl.dll

16.0.4936.1000

883992

16-Jun-21

11:11

wwintl.dll_1037

wwintl.dll

16.0.4936.1000

762144

16-Jun-21

11:11

wwintl.dll_1081

wwintl.dll

16.0.4936.1000

865056

16-Jun-21

11:11

wwintl.dll_1050

wwintl.dll

16.0.4936.1000

830744

16-Jun-21

11:11

wwintl.dll_1038

wwintl.dll

16.0.4936.1000

886560

16-Jun-21

11:11

wwintl.dll_1057

wwintl.dll

16.0.4936.1000

779040

16-Jun-21

11:11

wwintl.dll_1040

wwintl.dll

16.0.4936.1000

838424

16-Jun-21

11:11

wwintl.dll_1041

wwintl.dll

16.0.4936.1000

790304

16-Jun-21

11:11

wwintl.dll_1087

wwintl.dll

16.0.4936.1000

880408

16-Jun-21

11:11

wwintl.dll_1042

wwintl.dll

16.0.4936.1000

783136

16-Jun-21

11:11

wwintl.dll_1063

wwintl.dll

16.0.4936.1000

836896

16-Jun-21

11:11

wwintl.dll_1062

wwintl.dll

16.0.4936.1000

824608

16-Jun-21

11:11

wwintl.dll_1086

wwintl.dll

16.0.4936.1000

782616

16-Jun-21

11:11

wwintl.dll_1044

wwintl.dll

16.0.4936.1000

797168

16-Jun-21

11:11

wwintl.dll_1043

wwintl.dll

16.0.4936.1000

835872

16-Jun-21

11:11

wwintl.dll_1045

wwintl.dll

16.0.4936.1000

852256

16-Jun-21

11:11

wwintl.dll_1046

wwintl.dll

16.0.4936.1000

853280

16-Jun-21

11:11

wwintl.dll_2070

wwintl.dll

16.0.4936.1000

861464

16-Jun-21

11:11

wwintl.dll_1048

wwintl.dll

16.0.4936.1000

896280

16-Jun-21

11:11

wwintl.dll_1049

wwintl.dll

16.0.4936.1000

809968

16-Jun-21

11:11

wwintl.dll_1051

wwintl.dll

16.0.4936.1000

891160

16-Jun-21

11:11

wwintl.dll_1060

wwintl.dll

16.0.4936.1000

821768

16-Jun-21

11:11

wwintl.dll_2074

wwintl.dll

16.0.4936.1000

817944

16-Jun-21

11:11

wwintl.dll_9242

wwintl.dll

16.0.4936.1000

817952

16-Jun-21

11:11

wwintl.dll_1053

wwintl.dll

16.0.4936.1000

803616

16-Jun-21

11:11

wwintl.dll_1054

wwintl.dll

16.0.4936.1000

825112

16-Jun-21

11:11

wwintl.dll_1055

wwintl.dll

16.0.4936.1000

881952

16-Jun-21

11:11

wwintl.dll_1058

wwintl.dll

16.0.4936.1000

820000

16-Jun-21

11:11

wwintl.dll_1066

wwintl.dll

16.0.4936.1000

912672

16-Jun-21

11:11

wwintl.dll_2052

wwintl.dll

16.0.4936.1000

697120

16-Jun-21

11:11

wwintl.dll_1028

wwintl.dll

16.0.4936.1000

706240

16-Jun-21

11:11

jrpcard20.dll_1041

jrpcard20.dll

16.0.4834.1000

330960

15-Jun-21

08:22

pdfreflow.exe

pdfreflow.exe

16.0.5140.1000

10306344

15-Jun-21

08:20

wwintl.dll_1033

wwintl.dll

16.0.4936.1000

701152

15-Jun-21

08:18

msword.olb

msword.olb

939304

15-Jun-21

08:20

winword.exe

winword.exe

16.0.5188.1000

1937712

17-Jun-21

12:30

wrd12cnv.dll

wordcnv.dll

16.0.5188.1000

9184072

17-Jun-21

12:29

wwlib.dll

wwlib.dll

16.0.5188.1000

29627696

17-Jun-21

12:30

File identifier

File name

File version

File size

Date

Time

calligra.dll

calligra.dll

16.0.4528.1000

338688

16-Jun-21

11:26

genko.dll

genko.dll

16.0.5032.1000

513368

15-Jun-21

08:23

wdsrv.conversion.word.wwintl.dll_1025

wwintl.dll

16.0.5188.1000

944400

17-Jun-21

12:25

wwintl.dll_1025

wwintl.dll

16.0.5188.1000

944400

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1026

wwintl.dll

16.0.5188.1000

899376

17-Jun-21

12:25

wwintl.dll_1026

wwintl.dll

16.0.5188.1000

899376

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1029

wwintl.dll

16.0.5188.1000

955720

17-Jun-21

12:25

wwintl.dll_1029

wwintl.dll

16.0.5188.1000

955720

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1030

wwintl.dll

16.0.5188.1000

886552

17-Jun-21

12:25

wwintl.dll_1030

wwintl.dll

16.0.5188.1000

886552

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1031

wwintl.dll

16.0.5188.1000

966984

17-Jun-21

12:25

wwintl.dll_1031

wwintl.dll

16.0.5188.1000

966984

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1032

wwintl.dll

16.0.5188.1000

956688

17-Jun-21

12:25

wwintl.dll_1032

wwintl.dll

16.0.5188.1000

956688

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_3082

wwintl.dll

16.0.5188.1000

926488

17-Jun-21

12:25

wwintl.dll_3082

wwintl.dll

16.0.5188.1000

926488

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1061

wwintl.dll

16.0.5188.1000

849688

17-Jun-21

12:25

wwintl.dll_1061

wwintl.dll

16.0.5188.1000

849688

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1035

wwintl.dll

16.0.5188.1000

897352

17-Jun-21

12:25

wwintl.dll_1035

wwintl.dll

16.0.5188.1000

897352

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1036

wwintl.dll

16.0.5188.1000

962832

17-Jun-21

12:25

wwintl.dll_1036

wwintl.dll

16.0.5188.1000

962832

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1037

wwintl.dll

16.0.5188.1000

882960

17-Jun-21

12:25

wwintl.dll_1037

wwintl.dll

16.0.5188.1000

882960

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1081

wwintl.dll

16.0.5188.1000

944400

17-Jun-21

12:25

wwintl.dll_1081

wwintl.dll

16.0.5188.1000

944400

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1050

wwintl.dll

16.0.5188.1000

909584

17-Jun-21

12:25

wwintl.dll_1050

wwintl.dll

16.0.5188.1000

909584

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1038

wwintl.dll

16.0.5188.1000

965424

17-Jun-21

12:25

wwintl.dll_1038

wwintl.dll

16.0.5188.1000

965424

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1057

wwintl.dll

16.0.5188.1000

857928

17-Jun-21

12:25

wwintl.dll_1057

wwintl.dll

16.0.5188.1000

857928

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1040

wwintl.dll

16.0.5188.1000

917272

17-Jun-21

12:25

wwintl.dll_1040

wwintl.dll

16.0.5188.1000

917272

17-Jun-21

12:25

wac.word.wwintl.dll_1041

wwintl.dll

16.0.5188.1000

869192

wdsrv.conversion.word.wwintl.dll_1041

wwintl.dll

16.0.5188.1000

869192

17-Jun-21

12:25

wwintl.dll_1041

wwintl.dll

16.0.5188.1000

869192

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1087

wwintl.dll

16.0.5188.1000

959808

17-Jun-21

12:25

wwintl.dll_1087

wwintl.dll

16.0.5188.1000

959808

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1042

wwintl.dll

16.0.5188.1000

862488

17-Jun-21

12:25

wwintl.dll_1042

wwintl.dll

16.0.5188.1000

862488

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1063

wwintl.dll

16.0.5188.1000

916256

17-Jun-21

12:25

wwintl.dll_1063

wwintl.dll

16.0.5188.1000

916256

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1062

wwintl.dll

16.0.5188.1000

903440

17-Jun-21

12:25

wwintl.dll_1062

wwintl.dll

16.0.5188.1000

903440

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1086

wwintl.dll

16.0.5188.1000

862000

17-Jun-21

12:25

wwintl.dll_1086

wwintl.dll

16.0.5188.1000

862000

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1044

wwintl.dll

16.0.5188.1000

875824

17-Jun-21

12:25

wwintl.dll_1044

wwintl.dll

16.0.5188.1000

875824

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1043

wwintl.dll

16.0.5188.1000

915272

17-Jun-21

12:25

wwintl.dll_1043

wwintl.dll

16.0.5188.1000

915272

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1045

wwintl.dll

16.0.5188.1000

931600

17-Jun-21

12:25

wwintl.dll_1045

wwintl.dll

16.0.5188.1000

931600

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_1046

wwintl.dll

16.0.5188.1000

932632

17-Jun-21

12:25

wwintl.dll_1046

wwintl.dll

16.0.5188.1000

932632

17-Jun-21

12:25

wdsrv.conversion.word.wwintl.dll_2070

wwintl.dll

16.0.5188.1000

940304

17-Jun-21

12:26

wwintl.dll_2070

wwintl.dll

16.0.5188.1000

940304

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_1048

wwintl.dll

16.0.5188.1000

975640

17-Jun-21

12:26

wwintl.dll_1048

wwintl.dll

16.0.5188.1000

975640

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_1049

wwintl.dll

16.0.5188.1000

888624

17-Jun-21

12:26

wwintl.dll_1049

wwintl.dll

16.0.5188.1000

888624

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_1051

wwintl.dll

16.0.5188.1000

970568

17-Jun-21

12:26

wwintl.dll_1051

wwintl.dll

16.0.5188.1000

970568

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_1060

wwintl.dll

16.0.5188.1000

900368

17-Jun-21

12:26

wwintl.dll_1060

wwintl.dll

16.0.5188.1000

900368

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_2074

wwintl.dll

16.0.5188.1000

896792

17-Jun-21

12:26

wwintl.dll_2074

wwintl.dll

16.0.5188.1000

896792

17-Jun-21

12:26

wac.word.wwintl.dll_9242

wwintl.dll

16.0.5188.1000

896784

wdsrv.conversion.word.wwintl.dll_9242

wwintl.dll

16.0.5188.1000

896784

17-Jun-21

12:26

wwintl.dll_9242

wwintl.dll

16.0.5188.1000

896784

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_1053

wwintl.dll

16.0.5188.1000

882448

17-Jun-21

12:26

wwintl.dll_1053

wwintl.dll

16.0.5188.1000

882448

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_1054

wwintl.dll

16.0.5188.1000

903984

17-Jun-21

12:26

wwintl.dll_1054

wwintl.dll

16.0.5188.1000

903984

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_1055

wwintl.dll

16.0.5188.1000

960792

17-Jun-21

12:26

wwintl.dll_1055

wwintl.dll

16.0.5188.1000

960792

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_1058

wwintl.dll

16.0.5188.1000

898888

17-Jun-21

12:26

wwintl.dll_1058

wwintl.dll

16.0.5188.1000

898888

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_1066

wwintl.dll

16.0.5188.1000

992048

17-Jun-21

12:26

wwintl.dll_1066

wwintl.dll

16.0.5188.1000

992048

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_2052

wwintl.dll

16.0.5188.1000

775984

17-Jun-21

12:26

wwintl.dll_2052

wwintl.dll

16.0.5188.1000

775984

17-Jun-21

12:26

wdsrv.conversion.word.wwintl.dll_1028

wwintl.dll

16.0.5188.1000

784704

17-Jun-21

12:26

wwintl.dll_1028

wwintl.dll

16.0.5188.1000

784704

17-Jun-21

12:26

jrpcard20.dll_1041

jrpcard20.dll

16.0.4834.1000

331168

15-Jun-21

08:23

pdfreflow.exe

pdfreflow.exe

16.0.5140.1000

15919968

15-Jun-21

08:21

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

15-Jun-21

08:17

wwintl.dll_1033

wwintl.dll

16.0.4936.1000

780488

15-Jun-21

08:17

msword.olb

msword.olb

939304

15-Jun-21

08:21

winword.exe

winword.exe

16.0.5188.1000

1940760

17-Jun-21

12:28

wrd12cnv.dll

wordcnv.dll

16.0.5188.1000

11890968

17-Jun-21

12:28

wwlib.dll

wwlib.dll

16.0.5188.1000

37252424

17-Jun-21

12:28

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