const Tags::SimpleTag* Tags::Tag::GetSimpleTag(int index) const {
 if (index < 0)
 return NULL;

 if (index >= m_simple_tags_count)
 return NULL;

 return m_simple_tags + index;
}

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.