Description of the security update for Word 2016: May 8, 2018

Summary

This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about these vulnerabilities, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8161.Note To apply this security update, you must have the release version of 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 Determining your Office version).

Improvements and fixes

This security update contains improvements and fixes for the following nonsecurity issues:

• When you close an unsaved Information Rights Management (IRM) Office Open XML (OOXML) document, Word claims to be able to “keep unsaved changes,” but it actually produces a corrupted .ASD file.
• Assume that you open a document that is based on an untrusted template (.dotm) in Word 2016. Then, you edit it and create a new document. When you close the first document without saving, Word 2016 freezes.
• An email message that contains large inline pictures is not displayed correctly in the Outlook client on Windows.
• When you coauthor a Word document together with another user, the document’s normal style can be restricted if you have another restricted style in the document.
• In Word 2016, you may experience IME composition stopping unexpectedly.

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 stand-alone package for this update, go to the Microsoft Update Catalog website.

Method 3: Microsoft Download Center

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

• Download security update KB 4018383 for the 32-bit version of Word 2016
• Download security update KB 4018383 for the 64-bit version of Word 2016

More Information

Security update deployment information

For deployment information about this update, see security update deployment information: May 8, 2018.

Security update replacement information

This security update replaces previously released security update KB 4018339.

File hash information

Package name	Package hash SHA 1	Package hash SHA 2
word2016-kb4018383-fullfile-x64-glb.exe	106F8E99D03FB1A6781E789EC39860FFAEBC4757	C77A1A8E8D45B804CC9EE042C7469F60E7520448FB168D8E6E0CC7C27FEEC8A5
word2016-kb4018383-fullfile-x86-glb.exe	EDA01DC2092E1EF93047996C5D16012624D41E02	BF4CF2EF39B0632EAD23A2F1258449B6595DACD0120FDB19611077F8EBE8EA85

File informationThe English version of this security update has the file attributes (or later file attributes) that are listed in the following tables. 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 Word 2016

File identifier	File name	File version	File size	Date	Time
wwintl.dll_1025	wwintl.dll	16.0.4684.1000	821416	11-Apr-18	05:32
wwintl.dll_1026	wwintl.dll	16.0.4684.1000	818856	11-Apr-18	05:32
wwintl.dll_1029	wwintl.dll	16.0.4684.1000	874664	11-Apr-18	05:32
wwintl.dll_1030	wwintl.dll	16.0.4684.1000	806056	11-Apr-18	05:32
wwintl.dll_1031	wwintl.dll	16.0.4684.1000	885928	11-Apr-18	05:32
wwintl.dll_1032	wwintl.dll	16.0.4684.1000	876200	11-Apr-18	05:32
wwintl.dll_3082	wwintl.dll	16.0.4684.1000	845480	11-Apr-18	05:32
wwintl.dll_1061	wwintl.dll	16.0.4684.1000	769192	11-Apr-18	05:32
wwintl.dll_1035	wwintl.dll	16.0.4684.1000	816296	11-Apr-18	05:32
wwintl.dll_1036	wwintl.dll	16.0.4684.1000	881832	11-Apr-18	05:32
wwintl.dll_1037	wwintl.dll	16.0.4684.1000	759976	11-Apr-18	05:32
wwintl.dll_1081	wwintl.dll	16.0.4684.1000	863400	11-Apr-18	05:32
wwintl.dll_1050	wwintl.dll	16.0.4684.1000	828584	11-Apr-18	05:32
wwintl.dll_1038	wwintl.dll	16.0.4684.1000	884392	11-Apr-18	05:32
wwintl.dll_1057	wwintl.dll	16.0.4684.1000	777384	11-Apr-18	05:32
wwintl.dll_1040	wwintl.dll	16.0.4684.1000	836776	11-Apr-18	05:32
wwintl.dll_1041	wwintl.dll	16.0.4684.1000	788136	11-Apr-18	05:32
wwintl.dll_1087	wwintl.dll	16.0.4684.1000	878760	11-Apr-18	05:32
wwintl.dll_1042	wwintl.dll	16.0.4684.1000	781480	11-Apr-18	05:32
wwintl.dll_1063	wwintl.dll	16.0.4684.1000	835240	11-Apr-18	05:32
wwintl.dll_1062	wwintl.dll	16.0.4684.1000	822440	11-Apr-18	05:32
wwintl.dll_1086	wwintl.dll	16.0.4684.1000	780968	11-Apr-18	05:32
wwintl.dll_1044	wwintl.dll	16.0.4684.1000	794792	11-Apr-18	05:32
wwintl.dll_1043	wwintl.dll	16.0.4684.1000	834216	11-Apr-18	05:32
wwintl.dll_1045	wwintl.dll	16.0.4684.1000	850600	11-Apr-18	05:32
wwintl.dll_1046	wwintl.dll	16.0.4684.1000	851624	11-Apr-18	05:32
wwintl.dll_2070	wwintl.dll	16.0.4684.1000	859304	11-Apr-18	05:32
wwintl.dll_1048	wwintl.dll	16.0.4684.1000	894632	11-Apr-18	05:32
wwintl.dll_1049	wwintl.dll	16.0.4684.1000	807592	11-Apr-18	05:32
wwintl.dll_1051	wwintl.dll	16.0.4684.1000	889512	11-Apr-18	05:32
wwintl.dll_1060	wwintl.dll	16.0.4684.1000	819368	11-Apr-18	05:32
wwintl.dll_2074	wwintl.dll	16.0.4684.1000	815784	11-Apr-18	05:32
wwintl.dll_9242	wwintl.dll	16.0.4684.1000	815784	11-Apr-18	05:32
wwintl.dll_1053	wwintl.dll	16.0.4684.1000	801448	11-Apr-18	05:32
wwintl.dll_1054	wwintl.dll	16.0.4684.1000	823464	11-Apr-18	05:32
wwintl.dll_1055	wwintl.dll	16.0.4684.1000	879784	11-Apr-18	05:32
wwintl.dll_1058	wwintl.dll	16.0.4684.1000	818344	11-Apr-18	05:32
wwintl.dll_1066	wwintl.dll	16.0.4684.1000	911016	11-Apr-18	05:32
wwintl.dll_2052	wwintl.dll	16.0.4684.1000	694952	11-Apr-18	05:32
wwintl.dll_1028	wwintl.dll	16.0.4684.1000	704168	11-Apr-18	05:32
pdfreflow.exe	pdfreflow.exe	16.0.4684.1000	10302656	10-Apr-18	05:42
wwintl.dll_1033	wwintl.dll	16.0.4684.1000	698536	10-Apr-18	05:41
winword.exe	winword.exe	16.0.4690.1000	1936040	11-Apr-18	04:11
wrd12cnv.dll	wordcnv.dll	16.0.4690.1000	9163944	11-Apr-18	04:11
wwlib.dll	wwlib.dll	16.0.4690.1000	29587624	11-Apr-18	04:11

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For all supported x64-based versions of Word 2016

File identifier	File name	File version	File size	Date	Time
calligra.dll	calligra.dll	16.0.4528.1000	338688	11-Apr-18	05:52
wdsrv.conversion.word.wwintl.dll_1025	wwintl.dll	16.0.4690.1000	942760	11-Apr-18	04:12
wwintl.dll_1025	wwintl.dll	16.0.4690.1000	942760	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_1026	wwintl.dll	16.0.4690.1000	897704	11-Apr-18	04:11
wwintl.dll_1026	wwintl.dll	16.0.4690.1000	897704	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1029	wwintl.dll	16.0.4690.1000	953512	11-Apr-18	04:11
wwintl.dll_1029	wwintl.dll	16.0.4690.1000	953512	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1030	wwintl.dll	16.0.4690.1000	884904	11-Apr-18	04:11
wwintl.dll_1030	wwintl.dll	16.0.4690.1000	884904	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1031	wwintl.dll	16.0.4690.1000	965288	11-Apr-18	04:11
wwintl.dll_1031	wwintl.dll	16.0.4690.1000	965288	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1032	wwintl.dll	16.0.4690.1000	955048	11-Apr-18	04:11
wwintl.dll_1032	wwintl.dll	16.0.4690.1000	955048	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_3082	wwintl.dll	16.0.4690.1000	924840	11-Apr-18	04:11
wwintl.dll_3082	wwintl.dll	16.0.4690.1000	924840	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1061	wwintl.dll	16.0.4690.1000	848032	11-Apr-18	04:11
wwintl.dll_1061	wwintl.dll	16.0.4690.1000	848032	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1035	wwintl.dll	16.0.4690.1000	895144	11-Apr-18	04:11
wwintl.dll_1035	wwintl.dll	16.0.4690.1000	895144	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1036	wwintl.dll	16.0.4690.1000	960680	11-Apr-18	04:11
wwintl.dll_1036	wwintl.dll	16.0.4690.1000	960680	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1037	wwintl.dll	16.0.4690.1000	881320	11-Apr-18	04:12
wwintl.dll_1037	wwintl.dll	16.0.4690.1000	881320	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_1081	wwintl.dll	16.0.4690.1000	942248	11-Apr-18	04:11
wwintl.dll_1081	wwintl.dll	16.0.4690.1000	942248	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1050	wwintl.dll	16.0.4690.1000	907432	11-Apr-18	04:11
wwintl.dll_1050	wwintl.dll	16.0.4690.1000	907432	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1038	wwintl.dll	16.0.4690.1000	963240	11-Apr-18	04:11
wwintl.dll_1038	wwintl.dll	16.0.4690.1000	963240	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1057	wwintl.dll	16.0.4690.1000	856232	11-Apr-18	04:11
wwintl.dll_1057	wwintl.dll	16.0.4690.1000	856232	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1040	wwintl.dll	16.0.4690.1000	915624	11-Apr-18	04:11
wwintl.dll_1040	wwintl.dll	16.0.4690.1000	915624	11-Apr-18	04:11
wac.word.wwintl.dll_1041	wwintl.dll	16.0.4690.1000	866984
wdsrv.conversion.word.wwintl.dll_1041	wwintl.dll	16.0.4690.1000	866984	11-Apr-18	04:12
wwintl.dll_1041	wwintl.dll	16.0.4690.1000	866984	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_1087	wwintl.dll	16.0.4690.1000	957608	11-Apr-18	04:11
wwintl.dll_1087	wwintl.dll	16.0.4690.1000	957608	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1042	wwintl.dll	16.0.4690.1000	860328	11-Apr-18	04:12
wwintl.dll_1042	wwintl.dll	16.0.4690.1000	860328	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_1063	wwintl.dll	16.0.4690.1000	914088	11-Apr-18	04:11
wwintl.dll_1063	wwintl.dll	16.0.4690.1000	914088	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1062	wwintl.dll	16.0.4690.1000	901280	11-Apr-18	04:11
wwintl.dll_1062	wwintl.dll	16.0.4690.1000	901280	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1086	wwintl.dll	16.0.4690.1000	859816	11-Apr-18	04:11
wwintl.dll_1086	wwintl.dll	16.0.4690.1000	859816	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1044	wwintl.dll	16.0.4690.1000	873640	11-Apr-18	04:11
wwintl.dll_1044	wwintl.dll	16.0.4690.1000	873640	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1043	wwintl.dll	16.0.4690.1000	913064	11-Apr-18	04:11
wwintl.dll_1043	wwintl.dll	16.0.4690.1000	913064	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1045	wwintl.dll	16.0.4690.1000	929448	11-Apr-18	04:11
wwintl.dll_1045	wwintl.dll	16.0.4690.1000	929448	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_1046	wwintl.dll	16.0.4690.1000	930472	11-Apr-18	04:11
wwintl.dll_1046	wwintl.dll	16.0.4690.1000	930472	11-Apr-18	04:11
wdsrv.conversion.word.wwintl.dll_2070	wwintl.dll	16.0.4690.1000	938152	11-Apr-18	04:12
wwintl.dll_2070	wwintl.dll	16.0.4690.1000	938152	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_1048	wwintl.dll	16.0.4690.1000	973480	11-Apr-18	04:12
wwintl.dll_1048	wwintl.dll	16.0.4690.1000	973480	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_1049	wwintl.dll	16.0.4690.1000	886432	11-Apr-18	04:12
wwintl.dll_1049	wwintl.dll	16.0.4690.1000	886432	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_1051	wwintl.dll	16.0.4690.1000	968352	11-Apr-18	04:12
wwintl.dll_1051	wwintl.dll	16.0.4690.1000	968352	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_1060	wwintl.dll	16.0.4690.1000	898216	11-Apr-18	04:12
wwintl.dll_1060	wwintl.dll	16.0.4690.1000	898216	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_2074	wwintl.dll	16.0.4690.1000	894632	11-Apr-18	04:12
wwintl.dll_2074	wwintl.dll	16.0.4690.1000	894632	11-Apr-18	04:12
wac.word.wwintl.dll_9242	wwintl.dll	16.0.4690.1000	895144
wdsrv.conversion.word.wwintl.dll_9242	wwintl.dll	16.0.4690.1000	895144	11-Apr-18	04:12
wwintl.dll_9242	wwintl.dll	16.0.4690.1000	895144	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_1053	wwintl.dll	16.0.4690.1000	880296	11-Apr-18	04:12
wwintl.dll_1053	wwintl.dll	16.0.4690.1000	880296	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_1054	wwintl.dll	16.0.4690.1000	902312	11-Apr-18	04:12
wwintl.dll_1054	wwintl.dll	16.0.4690.1000	902312	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_1055	wwintl.dll	16.0.4690.1000	959144	11-Apr-18	04:13
wwintl.dll_1055	wwintl.dll	16.0.4690.1000	959144	11-Apr-18	04:13
wdsrv.conversion.word.wwintl.dll_1058	wwintl.dll	16.0.4690.1000	897192	11-Apr-18	04:13
wwintl.dll_1058	wwintl.dll	16.0.4690.1000	897192	11-Apr-18	04:13
wdsrv.conversion.word.wwintl.dll_1066	wwintl.dll	16.0.4690.1000	989864	11-Apr-18	04:12
wwintl.dll_1066	wwintl.dll	16.0.4690.1000	989864	11-Apr-18	04:12
wdsrv.conversion.word.wwintl.dll_2052	wwintl.dll	16.0.4690.1000	774312	11-Apr-18	04:13
wwintl.dll_2052	wwintl.dll	16.0.4690.1000	774312	11-Apr-18	04:13
wdsrv.conversion.word.wwintl.dll_1028	wwintl.dll	16.0.4690.1000	783016	11-Apr-18	04:13
wwintl.dll_1028	wwintl.dll	16.0.4690.1000	783016	11-Apr-18	04:13
pdfreflow.exe	pdfreflow.exe	16.0.4660.1000	15916224	10-Apr-18	05:51
wac.word.wwintl.dll_1033	wwintl.dll	16.0.4666.1000	778408
wdsrv.conversion.word.wwintl.dll_1033	wwintl.dll	16.0.4666.1000	778408	10-Apr-18	05:46
wwintl.dll_1033	wwintl.dll	16.0.4666.1000	778408	10-Apr-18	05:46
winword.exe	winword.exe	16.0.4690.1000	1939112	11-Apr-18	04:14
wrd12cnv.dll	wordcnv.dll	16.0.4690.1000	11864744	11-Apr-18	04:14
wwlib.dll	wwlib.dll	16.0.4690.1000	37200040	11-Apr-18	04:14

How to get help and support for this security updateHelp for installing updates: Windows Update: FAQSecurity solutions for IT professionals: TechNet Security Support and TroubleshootingHelp for protecting your Windows-based computer from viruses and malware: Microsoft SecureLocal support according to your country: International SupportPropose a feature or provide feedback on Office Core: Office User Voice portal