Microsoft July / August 2026 Security Updates

July 2026 Security Updates

This release consists of 622 Microsoft CVEs:
Product Family Distinct Updates Vulnerabiliities Addressed Updates per Product/Version Type of Update
Azure 13 11 1 Individual
Defender 2 5 1 Cumulative
Developer Tools 36 27 1 Cumulative
Exchange Server 4 5 1 Cumulative
Microsoft Edge 1 46 1 Cumulative
Office 10 82 1 Cumulative (except 2016)
Office 2016 18 82 1 Individual
Other 4 5 1 Individual
SharePoint Server 3 17 1 Cumulative
SQL Server 8 8 1 Cumulative
Windows 35 416 1 Cumulative

Notable CVEs
CVE ID Title Notable Item
CVE-2026-50661 Windows BitLocker Security Feature Bypass Vulnerability Publicly Known
CVE-2026-56155 Active Directory Federation Services Elevation of Privilege Vulnerability Exploitation Detected
CVE-2026-56155 Microsoft SharePoint Server Elevation of Privilege Vulnerability Exploitation Detected
We are republishing 428 non-Microsoft Chromium CVEs
Security Update Guide Blog Posts

Relevant Resources

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  • The new Hotpatching feature is now generally available. Please see Hotpatching feature for Windows Server Azure Edition virtual machines (VMs) for more information.
  • Windows 10 and Windows 11 updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows 10 and Windows 11, in addition to non-security updates. The updates are available via the Microsoft Update Catalog. For information on lifecycle and support dates for Windows 10 and Windows 11 operating systems, please see Windows Lifecycle Facts Sheet.
  • Microsoft is improving Windows Release Notes. For more information, please see What's next for Windows release notes.
  • A list of the latest servicing stack updates for each operating system can be found in ADV990001. This list will be updated whenever a new servicing stack update is released. It is important to install the latest servicing stack update.
  • In addition to security changes for the vulnerabilities, updates include defense-in-depth updates to help improve security-related features.
  • Customers running Windows Server 2008 R2, or Windows Server 2008 need to purchase the Extended Security Update to continue receiving security updates. See 4522133 for more information.

Known Issues
You can see these in more detail from the Deployments tab by selecting Known Issues column in the Edit Columns panel.

For more information about Windows Known Issues, please see Windows message center (links to currently-supported versions of Windows are in the left pane).

July 2026 Security Updates - Release Notes - Security Update Guide - Microsoft