uint64 FileTimeAsUint64(const FILETIME& ft) {
  ULARGE_INTEGER u;
  u.LowPart = ft.dwLowDateTime;
  u.HighPart = ft.dwHighDateTime;
  return u.QuadPart;
}

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.