Description of the security update for Skype for Business 2015 (Lync 2013): July 9, 2019

Applies to: Skype for Business 2015


This security update resolves an information disclosure vulnerability that exists if Microsoft Exchange allows entities to be created even though they have Display Names that contain non-printable characters. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2019-1084.
Note Before you apply this security update, see the prerequisites.

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2013. It doesn't apply to the Office 2013 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


Before you install this update, you must install Microsoft Office 2013 Service Pack 1 (KB 2817430).

Additionally, to install this update, you must have the following updates installed.

Update Download link
June 13, 2017, Lynchelploc update for Lync 2015 (Skype for Business) (KB 3191937) Download Download the 32-bit Lynchelploc update package now.

Download Download the 64-bit Lynchelploc update package now.

June 9, 2015, update for Office 2013 (KB 3054853)

Note You don't have to apply update 3054853 if you have applied the April 14, 2015, update (KB 2889923) or the May 12, 2015, security update (KB 3039779) for Lync 2013 (Skype for Business).


Security update deployment information

For deployment information about this update, see security update deployment information: July 9, 2018.

Security update replacement information

This security update replaces previously released security update 4461487.


File hash information

File name SHA1 hash SHA256 hash
lync2013-kb4475519-fullfile-x86-glb.exe 21DF3D17D390B881C372D2394648DA143E86ADC5 F1F6541787AE14D2C910BD053835F04D410E450403F558BDE60348AE47A39594
lync2013-kb4475519-fullfile-x64-glb.exe 2BEFC90FF0355402EFC9117329265252C01475CB E26132F467765CB05D4528EF2C32270B4D55CF458E2D061A1030366C84A70E5F

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.

How to get help and support for this security update

Help for installing updates: Protect yourself online

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

Local support according to your country: International Support