This update resolves vulnerabilities in the Microsoft .NET Framework. The vulnerabilities could allow remote code execution if a user either visits a specially crafted website or opens a specially crafted document. This update addresses the vulnerabilities by correcting how the Windows font library handles embedded fonts. To learn more about this vulnerability, see Microsoft Security Bulletin MS16-120.
- 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.
- This security update requires the Windows dwrite.dll component. Up-to-date Windows Vista SP2 and Windows Server 2008 SP2 systems are expected to have this component installed. If dwrite.dll is not present on a system, it can be downloaded here. Windows Update, WSUS, and Microsoft Update Catalog customers will receive the Windows dwrite.dll component through the 3078601 update as an automatic co-install, just in case it’s not already present.
Additional information about this security updateFor more information about this security update as it relates to Windows Vista and Windows Server 2008, see the following article in the Microsoft Knowledge Base:
3188744 MS16-120: Description of the Security and Quality Rollup for the .NET Framework 3.0 Service Pack 2, 4.5.2, and 4.6 for Windows Vista and Windows Server 2008: October 11, 2016
How to obtain and install this 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 get security updates automatically, see the "Turn on automatic updating in the Control Panel" section of this Safety & Security Center article.
Update deployment informationFor deployment information about this update, see Microsoft Knowledge Base article 3192884 .
Update removal informationNote We do not recommend that you remove any security update.
To remove this update, use the Programs and Features item in Control Panel.