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.
Related Links
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Get security update notifications Receive up-to-date information in RSS or e-mail format. |
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Security advisories View security changes that don’t require an update but may still affect customers. |
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Microsoft Security Response Center (MSRC) blog Keep up with news from the Microsoft Security Response Center. |
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Report a vulnerability Contribute to MSRC investigations of security vulnerabilities. |
Search by bulletin, KB, or CVE number OR Filter bulletins by product or component
| Date | Bulletin Number | KB Number | Title | Bulletin Rating |