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%ESTsoftALZipFormats, %PROGRAMFILES%ESTsoftALZipCoders, %PROGRAMFILES(X86)%ESTsoftALZipFormats, or %PROGRAMFILES(X86)%ESTsoftALZipCoders.