Summary

This security update fixes vulnerabilities in the VBScript scripting engine in Windows. The more severe of the vulnerabilities could allow remote code execution if an attacker hosts a specially crafted website that's designed to exploit the vulnerabilities through Internet Explorer (or if an attacker leverages a compromised website or a website that accepts or hosts user-provided content or advertisements) and then convinces a user to view the website. An attacker could also embed an ActiveX control marked as "safe for initialization" in an application or Microsoft Office document that uses the Internet Explorer rendering engine to direct the user to the specially crafted website. 

To learn more about the vulnerability, see Microsoft Security Bulletin MS15-126.

More Information

Important

  • All future security and nonsecurity updates for Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows Server 2012 R2-based computer so that you receive future updates.

  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

More information about this security update

The following articles contain more information about this security update as it relates to individual product versions. The articles may contain known issue information.

  • 3105578 MS15-126: Description of the security update for VBScript 5.8: December 8, 2015

  • 3105579 MS15-126: Description of the security update for VBScript 5.7: December 8, 2015

How to get and install the update

Method 1: Windows Update

This update is available through Windows 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.

More Information

Windows Vista (all editions)Reference Table

The following table contains the security update information for this software.

Security update file names

For JScript 5.7 and VBScript 5.7 on all supported 32-bit editions of Windows Vista:
Windows6.0-KB3105579-x86.msu

For JScript 5.7 and VBScript 5.7 on all supported x64-based editions of Windows Vista:
Windows6.0-KB3105579-x64.msu

Installation switches

See Microsoft Knowledge Base Article 934307

Restart requirement

In some cases, this update does not require a restart. If the required files are being used, this update will require a restart. If this behavior occurs, you receive a message that advises you to restart.

Removal information

WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates, and select from the list of updates.

File information

See the file information section.

Registry key verification

Note A registry key does not exist to validate the presence of this update.

Windows Server 2008 (all editions)Reference Table

The following table contains the security update information for this software.

Security update file names

For JScript 5.7 and VBScript 5.7 on all supported 32-bit editions of Windows Server 2008:
Windows6.0-KB3105579-x86.msu

For JScript 5.7 and VBScript 5.7 on all supported x64-based editions of Windows Server 2008:
Windows6.0-KB3105579-x64.msu

For JScript 5.7 and VBScript 5.7 on all supported Itanium-based editions of Windows Server 2008:
Windows6.0-KB3105579-ia64.msu

Installation switches

See Microsoft Knowledge Base Article 934307

Restart requirement

In some cases, this update does not require a restart. If the required files are being used, this update will require a restart. If this behavior occurs, you receive a message that advises you to restart.

Removal information

WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates, and select from the list of updates.

File information

See the file information section.

Registry key verification

Note A registry key does not exist to validate the presence of this update.

Windows Server 2008 R2 (all editions)Reference Table

The following table contains the security update information for this software.

Security update file name

For JScript 5.8 and VBScript 5.8 on all supported Server Core installations of x64-based editions of Windows Server 2008 R2:
Windows6.1-KB3105578-x64.msu

Installation switches

See Microsoft Knowledge Base Article 934307

Restart requirement

In some cases, this update does not require a restart. If the required files are being used, this update will require a restart. If this behavior occurs, you receive a message that advises you to restart.

Removal information

To uninstall an update installed by WUSA, use the /Uninstall setup switch or click Control Panel, click System and Security, and then under Windows Update, click View installed updates, and select from the list of updates.

File information

See the file information section.

Registry key verification

Note A registry key does not exist to validate the presence of this 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

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