there are some weaknesses which should get closed. A hackig team from bonn informed Microsoft and Forgotten Empires months ago. unfortunately they didn’t reply. if you know some german you can check out a Podcast linked in this gamestar article (Game-magazine): Wie Hacker die ultimative Cheat-Schwachstelle in Age of Empires 2 fanden
another article from august in ENGLISH: https://igamesnews.com/news/how-hackers-found-the-ultimate-cheat-vulnerability-in-age-of-empires-2/
here a post about this issue on this forum: Cheating and Security of Aoe DE II