An access weakness occurs when software does not properly implement permissions that could have unintended consequences if exploited by malicious actors. An example of this weakness is when a default username and password are set by the developer but do not get changed by the system administrator.
If this call fails, the program could fail to drop heightened privileges.
./src/VirtualBox-5.1.30/src/VBox/Devices/Graphics/shaderlib/wine/include/dde.h
WINUSERAPI BOOL WINAPI ImpersonateDdeClientWindow(HWND,HWND);