This issue is caused by applications passing an insufficiently qualified path when loading an external library. Microsoft has issued guidance to developers in the MSDN article, Dynamic-Link Library Security, on how to correctly use the available application programming interfaces to prevent this class of vulnerability. Microsoft is also actively reaching out to third-party vendors through the Microsoft Vulnerability Research Program to inform them of the mitigations available in the operating system. Microsoft is also actively investigating which of its own applications may be affected.
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