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.

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 information

The 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.

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

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 update

Help for installing updates: Windows Update: FAQ

Security solutions for IT professionals: TechNet Security Support and Troubleshooting

Help for protecting your Windows-based computer from viruses and malware: Microsoft Secure

Local support according to your country: International Support

Propose a feature or provide feedback on Office Core: Office User Voice portal

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