Sign in with Microsoft
Sign in or create an account.

Summary

This security update resolves a Microsoft Office trust center spoofing vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-43255.

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: December 14, 2021 (KB5008541).

Security update replacement information

This security update replaces previously released security update 5002005.

File hash information

File name

SHA256 hash

mso2016-kb5002033-fullfile-x86-glb.exe

ABDA0D142E843275D087EAC197867B94EC79CD178A1120057A07CE6AF00F6D23

mso2016-kb5002033-fullfile-x64-glb.exe

A0F572961F560584C4124126BC0EC62914CBD68A58A37E1921D5BD7D766DF7A4

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

5-Dec-21

10:16

msointl.dll.x86.1025

msointl.dll

16.0.4927.1000

3287904

5-Dec-21

10:02

msointl.dll.x86.1026

msointl.dll

16.0.4927.1000

1886048

5-Dec-21

10:00

msointl.dll.x86.1027

msointl.dll

16.0.4927.1000

1817952

5-Dec-21

10:18

msointl.dll.x86.1029

msointl.dll

16.0.4927.1000

1928032

5-Dec-21

10:03

msointl.dll.x86.1030

msointl.dll

16.0.4927.1000

1758040

5-Dec-21

10:03

msointl.dll.x86.1031

msointl.dll

16.0.4927.1000

1948216

5-Dec-21

10:02

msointl.dll.x86.1032

msointl.dll

16.0.4927.1000

2057048

5-Dec-21

10:03

msointl.dll.x86.3082

msointl.dll

16.0.4927.1000

1826360

5-Dec-21

10:03

msointl.dll.x86.1061

msointl.dll

16.0.4927.1000

1731664

5-Dec-21

10:00

msointl.dll.x86.1069

msointl.dll

16.0.4927.1000

1740640

5-Dec-21

10:18

msointl.dll.x86.1035

msointl.dll

16.0.4927.1000

1738504

5-Dec-21

10:03

msointl.dll.x86.1036

msointl.dll

16.0.4927.1000

1975360

5-Dec-21

10:03

msointl.dll.x86.1110

msointl.dll

16.0.4927.1000

1774648

5-Dec-21

10:18

msointl.dll.x86.1095

msointl.dll

16.0.4927.1000

1830688

5-Dec-21

10:18

msointl.dll.x86.1037

msointl.dll

16.0.4927.1000

2907936

5-Dec-21

10:03

msointl.dll.x86.1081

msointl.dll

16.0.4927.1000

1952312

5-Dec-21

10:03

msointl.dll.x86.1050

msointl.dll

16.0.4927.1000

1742088

5-Dec-21

10:03

msointl.dll.x86.1038

msointl.dll

16.0.4927.1000

1951584

5-Dec-21

10:00

msointl.dll.x86.1057

msointl.dll

16.0.4927.1000

1621848

5-Dec-21

10:00

msointl.dll.x86.1040

msointl.dll

16.0.4927.1000

1766240

5-Dec-21

10:03

msointl.dll.x86.1041

msointl.dll

16.0.4927.1000

2012512

5-Dec-21

10:02

msointl.dll.x86.1087

msointl.dll

16.0.4927.1000

2103648

5-Dec-21

10:03

msointl.dll.x86.1099

msointl.dll

16.0.4927.1000

1940320

5-Dec-21

10:19

msointl.dll.x86.1042

msointl.dll

16.0.4927.1000

2768736

5-Dec-21

10:03

msointl.dll.x86.1063

msointl.dll

16.0.4927.1000

1845808

5-Dec-21

10:03

msointl.dll.x86.1062

msointl.dll

16.0.4927.1000

1832016

5-Dec-21

10:03

msointl.dll.x86.1086

msointl.dll

16.0.4927.1000

1649232

5-Dec-21

10:00

msointl.dll.x86.1044

msointl.dll

16.0.4927.1000

1721624

5-Dec-21

10:03

msointl.dll.x86.1043

msointl.dll

16.0.4927.1000

1771264

5-Dec-21

10:03

msointl.dll.x86.1045

msointl.dll

16.0.4927.1000

1917280

5-Dec-21

10:03

msointl.dll.x86.1046

msointl.dll

16.0.4927.1000

1829656

5-Dec-21

10:03

msointl.dll.x86.2070

msointl.dll

16.0.4927.1000

1836312

5-Dec-21

10:03

msointl.dll.x86.1048

msointl.dll

16.0.4927.1000

1963064

5-Dec-21

10:03

msointl.dll.x86.1049

msointl.dll

16.0.4927.1000

1904384

5-Dec-21

10:03

msointl.dll.x86.1051

msointl.dll

16.0.4927.1000

1971552

5-Dec-21

10:00

msointl.dll.x86.1060

msointl.dll

16.0.4927.1000

1807712

5-Dec-21

10:00

msointl.dll.x86.2074

msointl.dll

16.0.4927.1000

1765936

5-Dec-21

10:03

msointl.dll.x86.9242

msointl.dll

16.0.4927.1000

1794912

5-Dec-21

10:03

msointl.dll.x86.1053

msointl.dll

16.0.4927.1000

1734912

5-Dec-21

10:03

msointl.dll.x86.1054

msointl.dll

16.0.4927.1000

1827376

5-Dec-21

10:03

msointl.dll.x86.1055

msointl.dll

16.0.4927.1000

1998680

5-Dec-21

10:03

msointl.dll.x86.1058

msointl.dll

16.0.4927.1000

1891896

5-Dec-21

10:03

msointl.dll.x86.1066

msointl.dll

16.0.4927.1000

2005552

5-Dec-21

10:00

msointl.dll.x86.2052

msointl.dll

16.0.4927.1000

2321704

5-Dec-21

10:03

msointl.dll.x86.1028

msointl.dll

16.0.4927.1000

2329384

5-Dec-21

10:03

msores.dll

msores.dll

16.0.4795.1000

81683304

5-Dec-21

10:15

msores.dll.x86

msores.dll

16.0.4795.1000

81683304

5-Dec-21

10:28

mso.dll.x86

mso.dll

16.0.5254.1001

14423896

6-Dec-21

11:43

msointl.dll.x86.1033

msointl.dll

16.0.4927.1000

1539640

5-Dec-21

10:15

File identifier

File name

File version

File size

Date

Time

firstrun.exe

firstrun.exe

16.0.5149.1000

816928

5-Dec-21

10:26

msointl.dll.x64.1025

msointl.dll

16.0.5254.1001

3324784

6-Dec-21

12:15

msointl.dll.x64.1026

msointl.dll

16.0.5254.1001

1911192

6-Dec-21

11:51

msointl.dll.x64.1027

msointl.dll

16.0.5254.1001

1842032

6-Dec-21

12:08

msointl.dll.x64.1029

msointl.dll

16.0.5254.1001

1952112

6-Dec-21

12:15

msointl.dll.x64.1030

msointl.dll

16.0.5254.1001

1782128

6-Dec-21

12:15

msointl.dll.x64.1031

msointl.dll

16.0.5254.1001

1972592

6-Dec-21

12:14

msointl.dll.x64.1032

msointl.dll

16.0.5254.1001

2081648

6-Dec-21

12:15

msointl.dll.x64.3082

msointl.dll

16.0.5254.1001

1850736

6-Dec-21

12:14

msointl.dll.x64.1061

msointl.dll

16.0.5254.1001

1755504

6-Dec-21

11:51

msointl.dll.x64.1069

msointl.dll

16.0.5254.1001

1764720

6-Dec-21

12:08

msointl.dll.x64.1035

msointl.dll

16.0.5254.1001

1762672

6-Dec-21

12:15

msointl.dll.x64.1036

msointl.dll

16.0.5254.1001

1999232

6-Dec-21

12:14

msointl.dll.x64.1110

msointl.dll

16.0.5254.1001

1799024

6-Dec-21

12:09

msointl.dll.x64.1095

msointl.dll

16.0.5254.1001

1854832

6-Dec-21

12:09

msointl.dll.x64.1037

msointl.dll

16.0.5254.1001

2944824

6-Dec-21

12:15

msointl.dll.x64.1081

msointl.dll

16.0.5254.1001

1976688

6-Dec-21

12:15

msointl.dll.x64.1050

msointl.dll

16.0.5254.1001

1766256

6-Dec-21

12:15

msointl.dll.x64.1038

msointl.dll

16.0.5254.1001

1977792

6-Dec-21

11:51

msointl.dll.x64.1057

msointl.dll

16.0.5254.1001

1645936

6-Dec-21

11:51

msointl.dll.x64.1040

msointl.dll

16.0.5254.1001

1791896

6-Dec-21

12:14

msointl.dll.x64.1041

msointl.dll

16.0.5254.1001

2036592

6-Dec-21

12:14

msointl.dll.x64.1087

msointl.dll

16.0.5254.1001

2128240

6-Dec-21

12:15

msointl.dll.x64.1099

msointl.dll

16.0.5254.1001

1964400

6-Dec-21

12:09

msointl.dll.x64.1042

msointl.dll

16.0.5254.1001

2794392

6-Dec-21

12:15

msointl.dll.x64.1063

msointl.dll

16.0.5254.1001

1869680

6-Dec-21

12:15

msointl.dll.x64.1062

msointl.dll

16.0.5254.1001

1855856

6-Dec-21

12:15

msointl.dll.x64.1086

msointl.dll

16.0.5254.1001

1673584

6-Dec-21

11:51

msointl.dll.x64.1044

msointl.dll

16.0.5254.1001

1745264

6-Dec-21

12:15

msointl.dll.x64.1043

msointl.dll

16.0.5254.1001

1795440

6-Dec-21

12:15

msointl.dll.x64.1045

msointl.dll

16.0.5254.1001

1941360

6-Dec-21

12:15

msointl.dll.x64.1046

msointl.dll

16.0.5254.1001

1853808

6-Dec-21

12:15

msointl.dll.x64.2070

msointl.dll

16.0.5254.1001

1860464

6-Dec-21

12:15

msointl.dll.x64.1048

msointl.dll

16.0.5254.1001

1986928

6-Dec-21

12:15

msointl.dll.x64.1049

msointl.dll

16.0.5254.1001

1928048

6-Dec-21

12:15

msointl.dll.x64.1051

msointl.dll

16.0.5254.1001

1996144

6-Dec-21

11:51

msointl.dll.x64.1060

msointl.dll

16.0.5254.1001

1832304

6-Dec-21

11:51

msointl.dll.x64.2074

msointl.dll

16.0.5254.1001

1790320

6-Dec-21

12:15

msointl.dll.x64.9242

msointl.dll

16.0.5254.1001

1818992

6-Dec-21

12:15

msointl.dll.x64.1053

msointl.dll

16.0.5254.1001

1759088

6-Dec-21

12:15

msointl.dll.x64.1054

msointl.dll

16.0.5254.1001

1851248

6-Dec-21

12:15

msointl.dll.x64.1055

msointl.dll

16.0.5254.1001

2023280

6-Dec-21

12:15

msointl.dll.x64.1058

msointl.dll

16.0.5254.1001

1915760

6-Dec-21

12:15

msointl.dll.x64.1066

msointl.dll

16.0.5254.1001

2029936

6-Dec-21

11:51

msointl.dll.x64.2052

msointl.dll

16.0.5254.1001

2348424

6-Dec-21

12:15

msointl.dll.x64.1028

msointl.dll

16.0.5254.1001

2353976

6-Dec-21

12:15

msointl.dll.x86.1025

msointl.dll

16.0.4927.1000

3287904

5-Dec-21

10:02

msointl.dll.x86.1026

msointl.dll

16.0.4927.1000

1886048

5-Dec-21

10:00

msointl.dll.x86.1029

msointl.dll

16.0.4927.1000

1928032

5-Dec-21

10:03

msointl.dll.x86.1030

msointl.dll

16.0.4927.1000

1758040

5-Dec-21

10:03

msointl.dll.x86.1031

msointl.dll

16.0.4927.1000

1948216

5-Dec-21

10:02

msointl.dll.x86.1032

msointl.dll

16.0.4927.1000

2057048

5-Dec-21

10:03

msointl.dll.x86.3082

msointl.dll

16.0.4927.1000

1826360

5-Dec-21

10:03

msointl.dll.x86.1061

msointl.dll

16.0.4927.1000

1731664

5-Dec-21

10:00

msointl.dll.x86.1035

msointl.dll

16.0.4927.1000

1738504

5-Dec-21

10:03

msointl.dll.x86.1036

msointl.dll

16.0.4927.1000

1975360

5-Dec-21

10:03

msointl.dll.x86.1037

msointl.dll

16.0.4927.1000

2907936

5-Dec-21

10:03

msointl.dll.x86.1081

msointl.dll

16.0.4927.1000

1952312

5-Dec-21

10:03

msointl.dll.x86.1050

msointl.dll

16.0.4927.1000

1742088

5-Dec-21

10:03

msointl.dll.x86.1038

msointl.dll

16.0.4927.1000

1951584

5-Dec-21

10:00

msointl.dll.x86.1057

msointl.dll

16.0.4927.1000

1621848

5-Dec-21

10:00

msointl.dll.x86.1040

msointl.dll

16.0.4927.1000

1766240

5-Dec-21

10:03

msointl.dll.x86.1041

msointl.dll

16.0.4927.1000

2012512

5-Dec-21

10:02

msointl.dll.x86.1087

msointl.dll

16.0.4927.1000

2103648

5-Dec-21

10:03

msointl.dll.x86.1042

msointl.dll

16.0.4927.1000

2768736

5-Dec-21

10:03

msointl.dll.x86.1063

msointl.dll

16.0.4927.1000

1845808

5-Dec-21

10:03

msointl.dll.x86.1062

msointl.dll

16.0.4927.1000

1832016

5-Dec-21

10:03

msointl.dll.x86.1086

msointl.dll

16.0.4927.1000

1649232

5-Dec-21

10:00

msointl.dll.x86.1044

msointl.dll

16.0.4927.1000

1721624

5-Dec-21

10:03

msointl.dll.x86.1043

msointl.dll

16.0.4927.1000

1771264

5-Dec-21

10:03

msointl.dll.x86.1045

msointl.dll

16.0.4927.1000

1917280

5-Dec-21

10:03

msointl.dll.x86.1046

msointl.dll

16.0.4927.1000

1829656

5-Dec-21

10:03

msointl.dll.x86.2070

msointl.dll

16.0.4927.1000

1836312

5-Dec-21

10:03

msointl.dll.x86.1048

msointl.dll

16.0.4927.1000

1963064

5-Dec-21

10:03

msointl.dll.x86.1049

msointl.dll

16.0.4927.1000

1904384

5-Dec-21

10:03

msointl.dll.x86.1051

msointl.dll

16.0.4927.1000

1971552

5-Dec-21

10:00

msointl.dll.x86.1060

msointl.dll

16.0.4927.1000

1807712

5-Dec-21

10:00

msointl.dll.x86.2074

msointl.dll

16.0.4927.1000

1765936

5-Dec-21

10:03

msointl.dll.x86.9242

msointl.dll

16.0.4927.1000

1794912

5-Dec-21

10:03

msointl.dll.x86.1053

msointl.dll

16.0.4927.1000

1734912

5-Dec-21

10:03

msointl.dll.x86.1054

msointl.dll

16.0.4927.1000

1827376

5-Dec-21

10:03

msointl.dll.x86.1055

msointl.dll

16.0.4927.1000

1998680

5-Dec-21

10:03

msointl.dll.x86.1058

msointl.dll

16.0.4927.1000

1891896

5-Dec-21

10:03

msointl.dll.x86.1066

msointl.dll

16.0.4927.1000

2005552

5-Dec-21

10:00

msointl.dll.x86.2052

msointl.dll

16.0.4927.1000

2321704

5-Dec-21

10:03

msointl.dll.x86.1028

msointl.dll

16.0.4927.1000

2329384

5-Dec-21

10:03

conversion.office.msores.dll

msores.dll

16.0.4795.1000

81683088

5-Dec-21

10:20

msores.dll

msores.dll

16.0.4795.1000

81683088

5-Dec-21

10:15

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

5-Dec-21

10:15

msores.dll.x86

msores.dll

16.0.4795.1000

81683304

5-Dec-21

10:28

mso.dll.x64

mso.dll

16.0.5254.1001

19881848

6-Dec-21

11:46

mso.dll.x86

mso.dll

16.0.5254.1001

14423896

6-Dec-21

11:43

msointl.dll.x64.1033

msointl.dll

16.0.4927.1000

1564424

5-Dec-21

10:21

msointl.dll.x86.1033

msointl.dll

16.0.4927.1000

1539640

5-Dec-21

10:15

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security

Need more help?

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

Was this information helpful?

What affected your experience?

Thank you for your feedback!

×