If you were able to exploit vulnerabilities in the server, the software distribution, and the client... but that's not testing Telegram itself, it's testing eve

If you were able to exploit vulnerabilities in the server, the software distribution, and the client... but that's not testing Telegram itself, it's testing everything in between -- including what's between the chair and keyboard. Which is where the weaknesses (as witnessed by bitcoin shenanigans) lie, anyhow.