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Microsoft Security Updates

New security update information is now located in the Security Update Guide

Bulletins released before 2017 are now archived

To view security update information prior to 2017, please use the Bulletin Archive, or use the Search box below.

Upcoming Release

  • Microsoft security updates are released on the second Tuesday of each month.

Latest Release

Microsoft has updated its security update publishing model:

Get the Updates from Microsoft Update

To get help protecting your home computer, please visit the Security Center for Home Users, or download the updates from Microsoft Update.

Download Detailed Security Update Information

Download an Excel file containing detailed information, such as affected components, bulletin replacements, reboot requirements, and related Common Vulnerabilities and Exposures (CVEs). Download Microsoft Security Update Data
Additionally, bulletin information in the Common Vulnerability Reporting Framework (CVRF) format is available through the Microsoft Security Update API (login required).

Search Bulletin Archives

Bulletins released before April 2017 will be archived. To search the archives, use the tool below. Please see the Security Update Guide for the latest security release information.