Summary

This security update resolves a Microsoft Office security feature bypass vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-34469.

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?). 

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 5001950.

File hash information

File name

SHA256 hash

mso2016-kb5001979-fullfile-x86-glb.exe

1AB033E098EE645AFA102C04A6D7AEAC356B0FEFDA75FD237F94267E663569D6

mso2016-kb5001979-fullfile-x64-glb.exe

95700F47B1AA89A01B5DCA5CD243453252BF333B1B0A598CE9CE17FB47269A60

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

firstrun.exe

firstrun.exe

16.0.5149.1000

774440

15-Jun-21

08:20

msointl.dll.x86.1025

msointl.dll

16.0.4927.1000

3287904

16-Jun-21

11:09

msointl.dll.x86.1026

msointl.dll

16.0.4927.1000

1886048

16-Jun-21

11:12

msointl.dll.x86.1027

msointl.dll

16.0.4927.1000

1817952

16-Jun-21

11:29

msointl.dll.x86.1029

msointl.dll

16.0.4927.1000

1928032

16-Jun-21

11:36

msointl.dll.x86.1030

msointl.dll

16.0.4927.1000

1758040

16-Jun-21

11:09

msointl.dll.x86.1031

msointl.dll

16.0.4927.1000

1948216

16-Jun-21

11:09

msointl.dll.x86.1032

msointl.dll

16.0.4927.1000

2057048

16-Jun-21

11:09

msointl.dll.x86.3082

msointl.dll

16.0.4927.1000

1826360

16-Jun-21

11:09

msointl.dll.x86.1061

msointl.dll

16.0.4927.1000

1731664

16-Jun-21

11:09

msointl.dll.x86.1069

msointl.dll

16.0.4927.1000

1740640

16-Jun-21

11:29

msointl.dll.x86.1035

msointl.dll

16.0.4927.1000

1738504

16-Jun-21

11:09

msointl.dll.x86.1036

msointl.dll

16.0.4927.1000

1975360

16-Jun-21

11:09

msointl.dll.x86.1110

msointl.dll

16.0.4927.1000

1774648

16-Jun-21

11:29

msointl.dll.x86.1095

msointl.dll

16.0.4927.1000

1830688

16-Jun-21

11:29

msointl.dll.x86.1037

msointl.dll

16.0.4927.1000

2907936

16-Jun-21

11:09

msointl.dll.x86.1081

msointl.dll

16.0.4927.1000

1952312

16-Jun-21

11:36

msointl.dll.x86.1050

msointl.dll

16.0.4927.1000

1742088

16-Jun-21

11:09

msointl.dll.x86.1038

msointl.dll

16.0.4927.1000

1951584

16-Jun-21

11:13

msointl.dll.x86.1057

msointl.dll

16.0.4927.1000

1621848

16-Jun-21

11:13

msointl.dll.x86.1040

msointl.dll

16.0.4927.1000

1766240

16-Jun-21

11:09

msointl.dll.x86.1041

msointl.dll

16.0.4927.1000

2012512

16-Jun-21

11:36

msointl.dll.x86.1087

msointl.dll

16.0.4927.1000

2103648

16-Jun-21

11:36

msointl.dll.x86.1099

msointl.dll

16.0.4927.1000

1940320

16-Jun-21

11:30

msointl.dll.x86.1042

msointl.dll

16.0.4927.1000

2768736

16-Jun-21

11:10

msointl.dll.x86.1063

msointl.dll

16.0.4927.1000

1845808

16-Jun-21

11:10

msointl.dll.x86.1062

msointl.dll

16.0.4927.1000

1832016

16-Jun-21

11:36

msointl.dll.x86.1086

msointl.dll

16.0.4927.1000

1649232

16-Jun-21

11:10

msointl.dll.x86.1044

msointl.dll

16.0.4927.1000

1721624

16-Jun-21

11:36

msointl.dll.x86.1043

msointl.dll

16.0.4927.1000

1771264

16-Jun-21

11:10

msointl.dll.x86.1045

msointl.dll

16.0.4927.1000

1917280

16-Jun-21

11:10

msointl.dll.x86.1046

msointl.dll

16.0.4927.1000

1829656

16-Jun-21

11:36

msointl.dll.x86.2070

msointl.dll

16.0.4927.1000

1836312

16-Jun-21

11:36

msointl.dll.x86.1048

msointl.dll

16.0.4927.1000

1963064

16-Jun-21

11:10

msointl.dll.x86.1049

msointl.dll

16.0.4927.1000

1904384

16-Jun-21

11:36

msointl.dll.x86.1051

msointl.dll

16.0.4927.1000

1971552

16-Jun-21

11:13

msointl.dll.x86.1060

msointl.dll

16.0.4927.1000

1807712

16-Jun-21

11:13

msointl.dll.x86.2074

msointl.dll

16.0.4927.1000

1765936

16-Jun-21

11:10

msointl.dll.x86.9242

msointl.dll

16.0.4927.1000

1794912

16-Jun-21

11:10

msointl.dll.x86.1053

msointl.dll

16.0.4927.1000

1734912

16-Jun-21

11:10

msointl.dll.x86.1054

msointl.dll

16.0.4927.1000

1827376

16-Jun-21

11:36

msointl.dll.x86.1055

msointl.dll

16.0.4927.1000

1998680

16-Jun-21

11:10

msointl.dll.x86.1058

msointl.dll

16.0.4927.1000

1891896

16-Jun-21

11:10

msointl.dll.x86.1066

msointl.dll

16.0.4927.1000

2005552

16-Jun-21

11:10

msointl.dll.x86.2052

msointl.dll

16.0.4927.1000

2321704

16-Jun-21

11:10

msointl.dll.x86.1028

msointl.dll

16.0.4927.1000

2329384

16-Jun-21

11:10

msores.dll

msores.dll

16.0.4795.1000

81683304

15-Jun-21

08:19

msores.dll.x86

msores.dll

16.0.4795.1000

81683304

15-Jun-21

08:22

mso.dll.x86

mso.dll

16.0.5188.1000

14422416

17-Jun-21

12:28

msointl.dll.x86.1033

msointl.dll

16.0.4927.1000

1539640

15-Jun-21

08:21

File identifier

File name

File version

File size

Date

Time

firstrun.exe

firstrun.exe

16.0.5149.1000

816928

15-Jun-21

08:21

msointl.dll.x64.1025

msointl.dll

16.0.5188.1000

3324808

17-Jun-21

12:57

msointl.dll.x64.1026

msointl.dll

16.0.5188.1000

1910152

17-Jun-21

12:32

msointl.dll.x64.1027

msointl.dll

16.0.5188.1000

1842008

17-Jun-21

12:50

msointl.dll.x64.1029

msointl.dll

16.0.5188.1000

1952088

17-Jun-21

12:57

msointl.dll.x64.1030

msointl.dll

16.0.5188.1000

1782128

17-Jun-21

12:57

msointl.dll.x64.1031

msointl.dll

16.0.5188.1000

1972608

17-Jun-21

12:57

msointl.dll.x64.1032

msointl.dll

16.0.5188.1000

2081640

17-Jun-21

12:57

msointl.dll.x64.3082

msointl.dll

16.0.5188.1000

1850752

17-Jun-21

12:57

msointl.dll.x64.1061

msointl.dll

16.0.5188.1000

1755528

17-Jun-21

12:32

msointl.dll.x64.1069

msointl.dll

16.0.5188.1000

1764720

17-Jun-21

12:50

msointl.dll.x64.1035

msointl.dll

16.0.5188.1000

1762672

17-Jun-21

12:57

msointl.dll.x64.1036

msointl.dll

16.0.5188.1000

1999208

17-Jun-21

12:57

msointl.dll.x64.1110

msointl.dll

16.0.5188.1000

1799048

17-Jun-21

12:51

msointl.dll.x64.1095

msointl.dll

16.0.5188.1000

1854856

17-Jun-21

12:51

msointl.dll.x64.1037

msointl.dll

16.0.5188.1000

2944840

17-Jun-21

12:57

msointl.dll.x64.1081

msointl.dll

16.0.5188.1000

1976664

17-Jun-21

12:57

msointl.dll.x64.1050

msointl.dll

16.0.5188.1000

1766256

17-Jun-21

12:57

msointl.dll.x64.1038

msointl.dll

16.0.5188.1000

1975664

17-Jun-21

12:32

msointl.dll.x64.1057

msointl.dll

16.0.5188.1000

1645936

17-Jun-21

12:32

msointl.dll.x64.1040

msointl.dll

16.0.5188.1000

1790832

17-Jun-21

12:57

msointl.dll.x64.1041

msointl.dll

16.0.5188.1000

2036592

17-Jun-21

12:57

msointl.dll.x64.1087

msointl.dll

16.0.5188.1000

2128208

17-Jun-21

12:57

msointl.dll.x64.1099

msointl.dll

16.0.5188.1000

1964400

17-Jun-21

12:51

msointl.dll.x64.1042

msointl.dll

16.0.5188.1000

2793328

17-Jun-21

12:57

msointl.dll.x64.1063

msointl.dll

16.0.5188.1000

1869680

17-Jun-21

12:57

msointl.dll.x64.1062

msointl.dll

16.0.5188.1000

1855872

17-Jun-21

12:57

msointl.dll.x64.1086

msointl.dll

16.0.5188.1000

1673552

17-Jun-21

12:33

msointl.dll.x64.1044

msointl.dll

16.0.5188.1000

1745264

17-Jun-21

12:57

msointl.dll.x64.1043

msointl.dll

16.0.5188.1000

1795464

17-Jun-21

12:57

msointl.dll.x64.1045

msointl.dll

16.0.5188.1000

1941360

17-Jun-21

12:57

msointl.dll.x64.1046

msointl.dll

16.0.5188.1000

1853776

17-Jun-21

12:57

msointl.dll.x64.2070

msointl.dll

16.0.5188.1000

1860464

17-Jun-21

12:57

msointl.dll.x64.1048

msointl.dll

16.0.5188.1000

1986928

17-Jun-21

12:57

msointl.dll.x64.1049

msointl.dll

16.0.5188.1000

1928072

17-Jun-21

12:57

msointl.dll.x64.1051

msointl.dll

16.0.5188.1000

1996144

17-Jun-21

12:33

msointl.dll.x64.1060

msointl.dll

16.0.5188.1000

1832304

17-Jun-21

12:33

msointl.dll.x64.2074

msointl.dll

16.0.5188.1000

1790320

17-Jun-21

12:57

msointl.dll.x64.9242

msointl.dll

16.0.5188.1000

1818992

17-Jun-21

12:57

msointl.dll.x64.1053

msointl.dll

16.0.5188.1000

1759088

17-Jun-21

12:57

msointl.dll.x64.1054

msointl.dll

16.0.5188.1000

1851264

17-Jun-21

12:57

msointl.dll.x64.1055

msointl.dll

16.0.5188.1000

2023280

17-Jun-21

12:57

msointl.dll.x64.1058

msointl.dll

16.0.5188.1000

1915760

17-Jun-21

12:57

msointl.dll.x64.1066

msointl.dll

16.0.5188.1000

2029936

17-Jun-21

12:33

msointl.dll.x64.2052

msointl.dll

16.0.5188.1000

2346296

17-Jun-21

12:57

msointl.dll.x64.1028

msointl.dll

16.0.5188.1000

2353968

17-Jun-21

12:57

msointl.dll.x86.1025

msointl.dll

16.0.4927.1000

3287904

16-Jun-21

11:09

msointl.dll.x86.1026

msointl.dll

16.0.4927.1000

1886048

16-Jun-21

11:12

msointl.dll.x86.1029

msointl.dll

16.0.4927.1000

1928032

16-Jun-21

11:36

msointl.dll.x86.1030

msointl.dll

16.0.4927.1000

1758040

16-Jun-21

11:09

msointl.dll.x86.1031

msointl.dll

16.0.4927.1000

1948216

16-Jun-21

11:36

msointl.dll.x86.1032

msointl.dll

16.0.4927.1000

2057048

16-Jun-21

11:09

msointl.dll.x86.3082

msointl.dll

16.0.4927.1000

1826360

16-Jun-21

11:36

msointl.dll.x86.1061

msointl.dll

16.0.4927.1000

1731664

16-Jun-21

11:09

msointl.dll.x86.1035

msointl.dll

16.0.4927.1000

1738504

16-Jun-21

11:09

msointl.dll.x86.1036

msointl.dll

16.0.4927.1000

1975360

16-Jun-21

11:09

msointl.dll.x86.1037

msointl.dll

16.0.4927.1000

2907936

16-Jun-21

11:09

msointl.dll.x86.1081

msointl.dll

16.0.4927.1000

1952312

16-Jun-21

11:36

msointl.dll.x86.1050

msointl.dll

16.0.4927.1000

1742088

16-Jun-21

11:09

msointl.dll.x86.1038

msointl.dll

16.0.4927.1000

1951584

16-Jun-21

11:13

msointl.dll.x86.1057

msointl.dll

16.0.4927.1000

1621848

16-Jun-21

11:13

msointl.dll.x86.1040

msointl.dll

16.0.4927.1000

1766240

16-Jun-21

11:09

msointl.dll.x86.1041

msointl.dll

16.0.4927.1000

2012512

16-Jun-21

11:36

msointl.dll.x86.1087

msointl.dll

16.0.4927.1000

2103648

16-Jun-21

11:10

msointl.dll.x86.1042

msointl.dll

16.0.4927.1000

2768736

16-Jun-21

11:10

msointl.dll.x86.1063

msointl.dll

16.0.4927.1000

1845808

16-Jun-21

11:10

msointl.dll.x86.1062

msointl.dll

16.0.4927.1000

1832016

16-Jun-21

11:36

msointl.dll.x86.1086

msointl.dll

16.0.4927.1000

1649232

16-Jun-21

11:10

msointl.dll.x86.1044

msointl.dll

16.0.4927.1000

1721624

16-Jun-21

11:36

msointl.dll.x86.1043

msointl.dll

16.0.4927.1000

1771264

16-Jun-21

11:10

msointl.dll.x86.1045

msointl.dll

16.0.4927.1000

1917280

16-Jun-21

11:10

msointl.dll.x86.1046

msointl.dll

16.0.4927.1000

1829656

16-Jun-21

11:36

msointl.dll.x86.2070

msointl.dll

16.0.4927.1000

1836312

16-Jun-21

11:36

msointl.dll.x86.1048

msointl.dll

16.0.4927.1000

1963064

16-Jun-21

11:10

msointl.dll.x86.1049

msointl.dll

16.0.4927.1000

1904384

16-Jun-21

11:36

msointl.dll.x86.1051

msointl.dll

16.0.4927.1000

1971552

16-Jun-21

11:13

msointl.dll.x86.1060

msointl.dll

16.0.4927.1000

1807712

16-Jun-21

11:13

msointl.dll.x86.2074

msointl.dll

16.0.4927.1000

1765936

16-Jun-21

11:10

msointl.dll.x86.9242

msointl.dll

16.0.4927.1000

1794912

16-Jun-21

11:10

msointl.dll.x86.1053

msointl.dll

16.0.4927.1000

1734912

16-Jun-21

11:10

msointl.dll.x86.1054

msointl.dll

16.0.4927.1000

1827376

16-Jun-21

11:36

msointl.dll.x86.1055

msointl.dll

16.0.4927.1000

1998680

16-Jun-21

11:10

msointl.dll.x86.1058

msointl.dll

16.0.4927.1000

1891896

16-Jun-21

11:10

msointl.dll.x86.1066

msointl.dll

16.0.4927.1000

2005552

16-Jun-21

11:13

msointl.dll.x86.2052

msointl.dll

16.0.4927.1000

2321704

16-Jun-21

11:10

msointl.dll.x86.1028

msointl.dll

16.0.4927.1000

2329384

16-Jun-21

11:10

conversion.office.msores.dll

msores.dll

16.0.4795.1000

81683088

15-Jun-21

08:16

msores.dll

msores.dll

16.0.4795.1000

81683088

15-Jun-21

08:19

ppt.conversion.msores.dll

msores.dll

16.0.4795.1000

81683088

ppt.edit.msores.dll

msores.dll

16.0.4795.1000

81683088

wac.office.msores.dll

msores.dll

16.0.4795.1000

81683088

msores.dll

msores.dll

16.0.4795.1000

81683304

15-Jun-21

08:19

msores.dll.x86

msores.dll

16.0.4795.1000

81683304

15-Jun-21

08:22

mso.dll.x64

mso.dll

16.0.5188.1000

19880280

17-Jun-21

12:27

mso.dll.x86

mso.dll

16.0.5188.1000

14422416

17-Jun-21

12:28

msointl.dll.x64.1033

msointl.dll

16.0.4927.1000

1564424

15-Jun-21

08:16

msointl.dll.x86.1033

msointl.dll

16.0.4927.1000

1539640

15-Jun-21

08:18

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