July 13, 2021—KB5004294 (Monthly Rollup)

**Important:**This release includes the Flash Removal Package. Taking this update will remove Adobe Flash from the device. For more information, see the Update on Adobe Flash Player End of Support.

**Important:**Windows Server 2012 has reached the end of mainstream support and is now in extended support. Starting in July 2020, there will no longer be optional releases (known as “C” or “D” releases) for this operating system. Operating systems in extended support have only cumulative monthly security updates (known as the “B” or Update Tuesday release).

Verify that****you have installed the required updates listed in theHow to get this update section before installing this update.

For information about the various types of Windows updates, such as critical, security, driver, service packs, and so on, please see the following article. To view other notes and messages, see the Windows Server 2012 update history home page.

Improvements and fixes

This security update includes improvements and fixes that were a part of update KB5004956 (released July 6, 2021) and addresses the following issues:

• Addresses an issue in which 16-bit applications fail with an error message that states a general fault in VBRUN300.DLL.
• Addresses an issue in which some EMFs built by using third-party applications that use ExtCreatePen andExtCreateFontIndirect render incorrectly.
• Adds Advanced Encryption Standard (AES) encryption protections for CVE-2021-33757. For more information, see KB5004605.
• Removes support for the PerformTicketSignature setting and permanently enablesEnforcement mode. For more information and additional steps to enable protection on domain controller servers, see Managing deployment of Kerberos S4U changes for CVE-2020-17049.
• Security updates to Windows Apps, Windows Fundamentals, Windows Authentication, Windows Operating System Security, Windows Graphics, Microsoft Scripting Engine, Windows HTML Platforms, and Windows MSHTML Platform.
  For more information about the resolved security vulnerabilities, please refer to the new Security Update Guide website.

Known issues in this update

• Perform the operation from a process that has administrator privilege.
• Perform the operation from a node that doesn’t have CSV ownership.
  Microsoft is working on a resolution and will provide an update in an upcoming release.

How to get this update

File information

For a list of the files that are provided in this update, download the file information for update 5004294.