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MS15-080: Description of the security update for Silverlight 5: August 11, 2015


This security update resolves vulnerabilities in the Microsoft .NET Framework and Microsoft Silverlight. These vulnerabilities could allow remote code execution if a user opens a specially crafted document or goes to an untrusted webpage that contains embedded TrueType or OpenType fonts. To learn more about this vulnerability, see Microsoft Security Bulletin MS15-080.

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Improvements included in this update

In addition to the vulnerabilities fixed that are by this security update, the update also includes functional, performance, reliability, and security improvements. This security update is backward-compatible with web applications that were created for earlier versions of Silverlight. This security update also includes the following improvements and fixes the following issues:
  • Issue 1

    Fixes an issue in the Silverlight 64-bit runtime that causes some applications to crash on Internet Explorer 11.

  • Issue 2

    Updates the Macintosh installer to successfully install on OS X systems that have Gatekeeper security enabled.

  • Issue 3

    Updates the Windows manual installer to include options to set MSN as your default homepage and Bing as your default search engine. Automated installations and upgrades of Silverlight (for example, installations and upgrades performed by Microsoft Update and WSUS) do not use the Silverlight installer user interface and do not offer to change your homepage or search engine.

Changes in this update

The Macintosh update does not install on OS X 10.5 (Leopard).

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How to obtain and install this update

Method 1: Microsoft Update and WSUS

This update is available through Windows Update for users enrolled in Microsoft Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see Get security updates automatically.

This update is also available through WSUS. If an earlier version of Silverlight is installed on the computer, this security update is offered as Security Update for Microsoft Silverlight (KB 3080333).

Method 2: Microsoft Silverlight site

The Silverlight installer includes all previous updates in addition to this security update. To install the latest version of Silverlight, go to the Get Microsoft Silverlight website.

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Update deployment information

For deployment information about this update, see Microsoft Knowledge Base Article 3078662 .

Update replacement information

This update replaces previously released update 3056819 .

File information
The English (United States) version of this update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the 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 the times may change when you perform certain operations on the files.

For all supported 64-bit releases of Silverlight 5 for Windows
File nameFile versionFile sizeDateTimePlatform

For all supported 32-bit releases of Silverlight 5 for Windows
File nameFile versionFile sizeDateTimePlatform

For all supported versions of Silverlight 5 for Macintosh
File nameFile versionFile sizeDateTimePlatform
Silverlight.dmgNot applicable15,091,09408-Aug-20157:58Not applicable

How to obtain help and support for this security update
Help for installing updates: Support for Microsoft Update

Security solutions for IT professionals: TechNet Security Troubleshooting and Support

Help for protecting your Windows-based computer from viruses and malware: Virus Solution and Security Center

Local support according to your country: International Support

For more information about Silverlight, go to the following Microsoft websites: To report issues about this update or to send any feedback to the Microsoft Silverlight development team, go to the following Microsoft website:

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Keywords: kbsecvulnerability, kbsecurity, kbsecreview, kbsecbulletin, kbmustloc, kblangall, kbpending, kbexpertiseinter, kbbug, atdownload, kb

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Article Info
Article ID : 3080333
Revision : 1
Created on : 1/7/2017
Published on : 8/11/2015
Exists online : False
Views : 219