_dbus_delete_file (const DBusString *filename,
                   DBusError        *error)
{
  const char *filename_c;

  _DBUS_ASSERT_ERROR_IS_CLEAR (error);

  filename_c = _dbus_string_get_const_data (filename);

  if (DeleteFileA (filename_c) == 0)
    {
      dbus_set_error (error, DBUS_ERROR_FAILED,
                      "Failed to delete file %s: %s\n",
                      filename_c, _dbus_strerror_from_errno ());
      return FALSE;
    }
  else
    return TRUE;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.