Description of the security update for Office 2016: September 14, 2021 (KB4484103)

Summary

This security update resolves a Microsoft Office spoofing vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-38650.

Note To apply this security update, you must have the release version of 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.

• Download security update 4484103 for the 32-bit version of Office 2016
• Download security update 4484103 for the 64-bit version of Office 2016

More information

Security update deployment information

For deployment information about this update, see Security update deployment information: September 14, 2021 (KB5005848).

Security update replacement information

This security update replaces previously released security update 4464534.

File hash information

File name	SHA256 hash
osfclient2016-kb4484103-fullfile-x86-glb.exe	E76412E0F148C5D52E609A373AEEB85778D446A44DD01590CC2333FC33BE24F9
osfclient2016-kb4484103-fullfile-x64-glb.exe	76C59F9FBDB41D427DB88A9D8A9542BA46835FA04000D621CBA4DD93930386A8

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.

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For all supported x86-based versions of Office 2016

File identifier	File name	File version	File size	Date	Time
osfintl.dll_1025	osfintl.dll	16.0.5215.1000	260944	18-Aug-21	03:28
osfintl.dll_1026	osfintl.dll	16.0.5215.1000	262992	18-Aug-21	02:56
osfintl.dll_1029	osfintl.dll	16.0.5215.1000	259456	18-Aug-21	03:28
osfintl.dll_1030	osfintl.dll	16.0.5215.1000	257928	18-Aug-21	03:28
osfintl.dll_1031	osfintl.dll	16.0.5215.1000	259504	18-Aug-21	03:28
osfintl.dll_1032	osfintl.dll	16.0.5215.1000	266576	18-Aug-21	03:28
osfintl.dll_3082	osfintl.dll	16.0.5215.1000	256920	18-Aug-21	03:28
osfintl.dll_1061	osfintl.dll	16.0.5215.1000	255888	18-Aug-21	02:56
osfintl.dll_1035	osfintl.dll	16.0.5215.1000	255344	18-Aug-21	03:28
osfintl.dll_1036	osfintl.dll	16.0.5215.1000	260488	18-Aug-21	03:28
osfintl.dll_1037	osfintl.dll	16.0.5215.1000	255824	18-Aug-21	03:28
osfintl.dll_1081	osfintl.dll	16.0.5215.1000	269648	18-Aug-21	03:28
osfintl.dll_1050	osfintl.dll	16.0.5215.1000	256432	18-Aug-21	03:28
osfintl.dll_1038	osfintl.dll	16.0.5215.1000	261000	18-Aug-21	02:56
osfintl.dll_1057	osfintl.dll	16.0.5215.1000	254856	18-Aug-21	02:56
osfintl.dll_1040	osfintl.dll	16.0.5215.1000	258456	18-Aug-21	03:28
osfintl.dll_1041	osfintl.dll	16.0.5215.1000	259920	18-Aug-21	03:28
osfintl.dll_1087	osfintl.dll	16.0.5215.1000	265040	18-Aug-21	03:28
osfintl.dll_1042	osfintl.dll	16.0.5215.1000	258384	18-Aug-21	03:28
osfintl.dll_1063	osfintl.dll	16.0.5215.1000	258456	18-Aug-21	03:28
osfintl.dll_1062	osfintl.dll	16.0.5215.1000	259472	18-Aug-21	03:28
osfintl.dll_1086	osfintl.dll	16.0.5215.1000	255880	18-Aug-21	02:56
osfintl.dll_1044	osfintl.dll	16.0.5215.1000	254856	18-Aug-21	03:28
osfintl.dll_1043	osfintl.dll	16.0.5215.1000	257928	18-Aug-21	03:28
osfintl.dll_1045	osfintl.dll	16.0.5215.1000	258960	18-Aug-21	03:28
osfintl.dll_1046	osfintl.dll	16.0.5215.1000	256928	18-Aug-21	03:28
osfintl.dll_2070	osfintl.dll	16.0.5215.1000	256928	18-Aug-21	03:28
osfintl.dll_1048	osfintl.dll	16.0.5215.1000	262512	18-Aug-21	03:28
osfintl.dll_1049	osfintl.dll	16.0.5215.1000	264016	18-Aug-21	03:28
osfintl.dll_1051	osfintl.dll	16.0.5215.1000	259984	18-Aug-21	02:56
osfintl.dll_1060	osfintl.dll	16.0.5215.1000	256952	18-Aug-21	02:56
osfintl.dll_2074	osfintl.dll	16.0.5215.1000	256432	18-Aug-21	03:28
osfintl.dll_9242	osfintl.dll	16.0.5215.1000	258480	18-Aug-21	03:28
osfintl.dll_1053	osfintl.dll	16.0.5215.1000	255872	18-Aug-21	03:28
osfintl.dll_1054	osfintl.dll	16.0.5215.1000	265040	18-Aug-21	03:28
osfintl.dll_1055	osfintl.dll	16.0.5215.1000	258952	18-Aug-21	03:28
osfintl.dll_1058	osfintl.dll	16.0.5215.1000	264016	18-Aug-21	03:28
osfintl.dll_1066	osfintl.dll	16.0.5215.1000	260432	18-Aug-21	02:56
osfintl.dll_2052	osfintl.dll	16.0.5215.1000	253776	18-Aug-21	03:28
osfintl.dll_1028	osfintl.dll	16.0.5215.1000	253776	18-Aug-21	03:28
osfintl.dll_1033	osfintl.dll	16.0.5215.1000	253840	18-Aug-21	03:28
minsbproxy.dll	minsbproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:51
minsbproxy.dll.x86	minsbproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:58
minsbroamingproxy.dll	minsbroamingproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:51
minsbroamingproxy.dll.x86	minsbroamingproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:58
msosb.dll	msosb.dll	16.0.5215.1000	155504	18-Aug-21	02:51
msosb.dll.x86	msosb.dll	16.0.5215.1000	155504	18-Aug-21	02:58
osf.dll	osf.dll	16.0.5215.1000	1183120	18-Aug-21	02:51
osfproxy.dll	osfproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:51
osfproxy.dll.x86	osfproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:58
osfroamingproxy.dll	osfroamingproxy.dll	16.0.5215.1000	44432	18-Aug-21	02:51
osfroamingproxy.dll.x86	osfroamingproxy.dll	16.0.5215.1000	44432	18-Aug-21	02:58
osfshared.dll	osfshared.dll	16.0.5200.1000	145808	17-Aug-21	03:40
osfui.dll	osfui.dll	16.0.5200.1000	343440	17-Aug-21	03:40
websb.dll	websandbox.dll	16.0.5215.1000	632208	18-Aug-21	02:51

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For all supported x64-based versions of Office 2016

File identifier	File name	File version	File size	Date	Time
osfintl.dll_1025	osfintl.dll	16.0.5215.1000	260896	18-Aug-21	03:30
osfintl.dll_1026	osfintl.dll	16.0.5215.1000	262968	18-Aug-21	02:58
osfintl.dll_1029	osfintl.dll	16.0.5215.1000	259432	18-Aug-21	03:30
osfintl.dll_1030	osfintl.dll	16.0.5215.1000	257904	18-Aug-21	03:30
osfintl.dll_1031	osfintl.dll	16.0.5215.1000	259480	18-Aug-21	03:30
osfintl.dll_1032	osfintl.dll	16.0.5215.1000	266552	18-Aug-21	03:30
osfintl.dll_3082	osfintl.dll	16.0.5215.1000	256896	18-Aug-21	03:30
osfintl.dll_1061	osfintl.dll	16.0.5215.1000	255864	18-Aug-21	02:58
osfintl.dll_1035	osfintl.dll	16.0.5215.1000	255296	18-Aug-21	03:30
osfintl.dll_1036	osfintl.dll	16.0.5215.1000	260440	18-Aug-21	03:30
osfintl.dll_1037	osfintl.dll	16.0.5215.1000	255792	18-Aug-21	03:30
osfintl.dll_1081	osfintl.dll	16.0.5215.1000	269624	18-Aug-21	03:30
osfintl.dll_1050	osfintl.dll	16.0.5215.1000	256416	18-Aug-21	03:30
osfintl.dll_1038	osfintl.dll	16.0.5215.1000	260976	18-Aug-21	02:58
osfintl.dll_1057	osfintl.dll	16.0.5215.1000	254816	18-Aug-21	02:58
osfintl.dll_1040	osfintl.dll	16.0.5215.1000	258424	18-Aug-21	03:30
osfintl.dll_1041	osfintl.dll	16.0.5215.1000	259872	18-Aug-21	03:30
osfintl.dll_1087	osfintl.dll	16.0.5215.1000	265008	18-Aug-21	03:30
osfintl.dll_1042	osfintl.dll	16.0.5215.1000	258336	18-Aug-21	03:30
osfintl.dll_1063	osfintl.dll	16.0.5215.1000	258416	18-Aug-21	03:30
osfintl.dll_1062	osfintl.dll	16.0.5215.1000	259440	18-Aug-21	03:30
osfintl.dll_1086	osfintl.dll	16.0.5215.1000	255848	18-Aug-21	02:58
osfintl.dll_1044	osfintl.dll	16.0.5215.1000	254824	18-Aug-21	03:30
osfintl.dll_1043	osfintl.dll	16.0.5215.1000	257880	18-Aug-21	03:30
osfintl.dll_1045	osfintl.dll	16.0.5215.1000	258952	18-Aug-21	03:30
osfintl.dll_1046	osfintl.dll	16.0.5215.1000	256888	18-Aug-21	03:30
osfintl.dll_2070	osfintl.dll	16.0.5215.1000	256888	18-Aug-21	03:30
osfintl.dll_1048	osfintl.dll	16.0.5215.1000	262520	18-Aug-21	03:30
osfintl.dll_1049	osfintl.dll	16.0.5215.1000	263968	18-Aug-21	03:30
osfintl.dll_1051	osfintl.dll	16.0.5215.1000	259952	18-Aug-21	02:58
osfintl.dll_1060	osfintl.dll	16.0.5215.1000	256896	18-Aug-21	02:58
osfintl.dll_2074	osfintl.dll	16.0.5215.1000	256400	18-Aug-21	03:30
osfintl.dll_9242	osfintl.dll	16.0.5215.1000	258464	18-Aug-21	03:30
osfintl.dll_1053	osfintl.dll	16.0.5215.1000	255848	18-Aug-21	03:30
osfintl.dll_1054	osfintl.dll	16.0.5215.1000	265000	18-Aug-21	03:30
osfintl.dll_1055	osfintl.dll	16.0.5215.1000	258912	18-Aug-21	03:30
osfintl.dll_1058	osfintl.dll	16.0.5215.1000	263984	18-Aug-21	03:30
osfintl.dll_1066	osfintl.dll	16.0.5215.1000	260400	18-Aug-21	02:58
osfintl.dll_2052	osfintl.dll	16.0.5215.1000	253736	18-Aug-21	03:30
osfintl.dll_1028	osfintl.dll	16.0.5215.1000	253736	18-Aug-21	03:30
osfintl.dll_1033	osfintl.dll	16.0.5215.1000	253808	18-Aug-21	03:30
minsbproxy.dll	minsbproxy.dll	16.0.5215.1000	51576	18-Aug-21	02:51
minsbroamingproxy.dll	minsbroamingproxy.dll	16.0.5215.1000	51568	18-Aug-21	02:51
msosb.dll	msosb.dll	16.0.5215.1000	218480	18-Aug-21	02:51
osf.dll	osf.dll	16.0.5215.1000	1835400	18-Aug-21	02:53
osfproxy.dll	osfproxy.dll	16.0.5215.1000	51576	18-Aug-21	02:51
osfroamingproxy.dll	osfroamingproxy.dll	16.0.5215.1000	51584	18-Aug-21	02:51
osfshared.dll	osfshared.dll	16.0.5200.1000	228728	17-Aug-21	03:49
osfui.dll	osfui.dll	16.0.5200.1000	497496	17-Aug-21	03:49
websb.dll	websandbox.dll	16.0.5215.1000	893824	18-Aug-21	02:53
minsbproxy.dll	minsbproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:51
minsbproxy.dll.x86	minsbproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:58
minsbroamingproxy.dll	minsbroamingproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:51
minsbroamingproxy.dll.x86	minsbroamingproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:58
msosb.dll	msosb.dll	16.0.5215.1000	155504	18-Aug-21	02:51
msosb.dll.x86	msosb.dll	16.0.5215.1000	155504	18-Aug-21	02:58
osfproxy.dll	osfproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:51
osfproxy.dll.x86	osfproxy.dll	16.0.5215.1000	44424	18-Aug-21	02:58
osfroamingproxy.dll	osfroamingproxy.dll	16.0.5215.1000	44432	18-Aug-21	02:51
osfroamingproxy.dll.x86	osfroamingproxy.dll	16.0.5215.1000	44432	18-Aug-21	02:58

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