One of them requires the user to click run on a file, much like running an EXE. The other, simply saves potentially malicious data to external storage which would then have to be run by a separate malicious third-party app. This are far from RCE exploits that execute immediately without poor user decision making, and Rust is not impervious to security exploits similar to these.
https://securelist.com/zero-day-vulnerability-in-telegram/83...
and others...
https://www.notebookcheck.net/Researchers-at-Symantec-discov...