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The version number of the Mfc42u.dll file is not updated when you apply security update MS07-012

Support for Windows XP has ended

Microsoft ended support for Windows XP on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

Support for Windows Server 2003 ended on July 14, 2015

Microsoft ended support for Windows Server 2003 on July 14, 2015. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

SYMPTOMS
When you apply security update MS07-012, the version number of the Mfc42u.dll file is not updated. The Mfc42u.dll file is located in the following folder:
%windir%\System32
CAUSE
This issue occurs because the updated version of the Mfc42u.dll file that is included for the Microsoft Windows operating systems that are listed in the "Applies to" section does not use a newer version number. The older version number (6.5.9146.0) is used on these Windows operating systems.

Note The Mfc42u.dll file may also be located in folders other than the %windir%\System32 folder. For example, the Mfc42u.dll file may also be located in the following folders:
%windir%\syswow64
%windir%\winSxS
The version number for the Mfc42u.dll file in these folders is correct.
WORKAROUND
The security update for the Windows operating systems that are listed in the "Applies to" section is correctly offered on the Windows Update Web site. The update is offered despite the incorrect version number. Therefore, no additional action is required.
MORE INFORMATION
For more information about security update MS07-012, click the following article number to view the article in the Microsoft Knowledge Base:
924667 MS07-012: Vulnerability in Microsoft Foundation Classes could allow for remote code execution
security update patch bulletin mfc mfc42u.dll vulnerability
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.
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Article ID: 933339 - Last Review: 07/01/2010 03:56:00 - Revision: 2.0

Microsoft Windows Server 2003 Service Pack 1, Microsoft Windows XP Professional x64 Edition, Microsoft Security Essentials

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