Release Notes

July 2020 Security Updates
Release Date: July 14, 2020

The July 2020 security release consists of security updates for the following software:

  • Microsoft Windows
  • Microsoft Edge (EdgeHTML-based)
  • Microsoft Edge (Chromium-based) in IE Mode
  • Microsoft ChakraCore
  • Internet Explorer
  • Microsoft Office and Microsoft Office Services and Web Apps
  • Windows Defender
  • Skype for Business
  • Visual Studio
  • Microsoft OneDrive
  • Open Source Software
  • .NET Framework
  • Azure DevOps

Please note the following information regarding the security updates:

  • For information regarding enabling Windows 10, version 1909 features, please see Windows 10, version 1909 delivery options. Note that Windows 10, versions 1903 and 1909 share a common core operating system with an identical set of system files. They will also share the same security update KBs.
  • Windows 10 updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows 10, 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 operating systems, please see Windows Lifecycle Facts Sheet.
  • 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.
  • Updates for Windows RT 8.1 and Microsoft Office RT software are only available via Windows Update.
  • In addition to security changes for the vulnerabilities, updates include defense-in-depth updates to help improve security-related features.
  • Customers running Windows 7, 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.

The following CVEs have FAQs, Mitigations and Workarounds with additional information and may include * further steps to take after installing the updates. Please note that this is not a complete list of CVEs for this release.

Known Issues

The following KBs contain information about known issues with the security updates. For a complete list of security update KBs, please see 20200714. For more information about Windows Known Issues, please see Windows message center (links to currently-supported versions of Windows are in the left pane).

KB Article Applies To
4558998 Windows 10 Version 1809, Windows Server 2019
4565483 Windows 10, version 1903, Windows Server version 1903, Windows 10, version 1909, Windows Server version 1909
4565511 Windows 10, version 1607, Windows Server 2016
4565524 Windows 7, Windows Server 2008 R2 (Monthly Rollup)
4565529 Windows Server 2008 (Security-only update)
4565535 Windows Server 2012 (Security-only update)
4565536 Windows Server 2008 (Monthly Rollup)
4565537 Windows Server 2012 (Monthly Rollup)
4565539 Windows 7, Windows Server 2008 R2 (Security-only update)
4565540 Windows 8.1, Windows Server 2012 R2 (Security-only update)
4565541 Windows 8.1, Windows Server 2012 R2 (Monthly Rollup)