ESTsoft ALZip before 10.76 allows local users to execute arbitrary code via creating a malicious .DLL file and installing it in a specific directory: %PROGRAMFILES%\ESTsoft\ALZip\Formats, %PROGRAMFILES%\ESTsoft\ALZip\Coders, %PROGRAMFILES(X86)%\ESTsoft\ALZip\Formats, or %PROGRAMFILES(X86)%\ESTsoft\ALZip\Coders.