The "delete for" feature in Telegram before 5.11 on Android does not delete shared media files from the Telegram Images directory. In other words, there is a potentially misleading UI indication that a sender can remove a recipient's copy of a previously sent image (analogous to supported functionality in which a sender can remove a recipient's copy of a previously sent message).
- https://github.com/RootUp/PersonalStuff/blob/master/Telegram_Privacy.pdf
- https://www.inputzero.io/2019/09/telegram-privacy-fails-again.html
No PoCs found on GitHub currently.