MS16-053: Description of the security update for JScript and VBScript 5.7: May 10, 2016

Summary

This security update resolves vulnerabilities in the JScript and VBScript scripting engines in Microsoft Windows. The vulnerabilities could allow remote code execution if a user visits a specially crafted website. An attacker who successfully exploits these vulnerabilities could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploits these vulnerabilities could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

To learn more about the vulnerability, see Microsoft Security Bulletin MS16-053.

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Important

• 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.

How to obtain 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.

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Method 2: Microsoft Download Center

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

Click the download link in Microsoft Security Bulletin MS16-053 that corresponds to the version of Windows that you are running.

More Information

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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

File Information

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File hash information

File name	SHA1 hash	SHA256 hash
Windows6.0-KB3158991-x86.msu	3983349C99B5E09E0C6ACB09443BE69CCE3FBBD7	B15290E7D4FAAA529BCCEF285C05A2036AD010B8F709F3AF57C9671C96F24965
Windows6.0-KB3158991-ia64.msu	C4CF2ECDCB59A8A7DD614CF2AF3ADAF1A9DD4253	29DBEB4C7FFC849298C001B587F2088E81DB7EC8EA57C9266818DDAFB99678D3
Windows6.0-KB3158991-x64.msu	E8690F843B93E48FC0086183A320106EDE47993F	B39F48F79A96E6CCDA4709CFDD427AC995246CE9DF3948B8637D813F213DD21B

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File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.Windows Vista and Windows Server 2008 file informationNotes

* The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:Version	Product	Milestone	Service branch
6.0.600 2.19xxx	Windows Vista or Windows Server 2008	SP2	GDR
6.0.600 2.23xxx	Windows Vista or Windows Server 2008	SP2	LDR

• GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
• The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

For all supported x86-based versionsFile name	File version	File size	Date	Time	Platform
Jscript.dll	5.7.6002.19642	516,096	23-Apr-2016	04:44	x86
Jscript.dll	5.7.6002.23956	516,096	23-Apr-2016	04:42	x86
Vbscript.dll	5.7.6002.19642	434,176	23-Apr-2016	04:45	x86
Vbscript.dll	5.7.6002.23956	434,176	23-Apr-2016	04:43	x86
For all supported ia64-based versionsFile name	File version	File size	Date	Time	Platform
—	—	—	—	—	—
Jscript.dll	5.7.6002.19642	1,394,688	24-Apr-2016	03:39	IA-64
Jscript.dll	5.7.6002.23956	1,395,200	24-Apr-2016	03:02	IA-64
Vbscript.dll	5.7.6002.19642	1,174,016	24-Apr-2016	03:40	IA-64
Vbscript.dll	5.7.6002.23956	1,175,552	24-Apr-2016	03:02	IA-64
Jscript.dll	5.7.6002.19642	516,096	23-Apr-2016	04:44	x86
Jscript.dll	5.7.6002.23956	516,096	23-Apr-2016	04:42	x86
Vbscript.dll	5.7.6002.19642	434,176	23-Apr-2016	04:45	x86
Vbscript.dll	5.7.6002.23956	434,176	23-Apr-2016	04:43	x86
For all supported x64-based versionsFile name	File version	File size	Date	Time	Platform
—	—	—	—	—	—
Jscript.dll	5.7.6002.19642	755,200	24-Apr-2016	04:07	x64
Jscript.dll	5.7.6002.23956	755,200	24-Apr-2016	03:24	x64
Vbscript.dll	5.7.6002.19642	583,680	24-Apr-2016	04:07	x64
Vbscript.dll	5.7.6002.23956	583,168	24-Apr-2016	03:24	x64
Jscript.dll	5.7.6002.19642	516,096	23-Apr-2016	04:44	x86
Jscript.dll	5.7.6002.23956	516,096	23-Apr-2016	04:42	x86
Vbscript.dll	5.7.6002.19642	434,176	23-Apr-2016	04:45	x86
Vbscript.dll	5.7.6002.23956	434,176	23-Apr-2016	04:43	x86