Hacks can include flying, speedhacks, etc. Since the game is in such early development, an anti-cheat/constant monitor is not implemented, so hackers are rather common even on the official servers (unfortunately).
Tip: Most, if not all, hackers are still susceptible to death. If you encounter a hacker, you are advised to log out or secure yourself. If none of the above are applicable, you may attempt to kill them. Most will die from 1-2 shots to the head with any powerful weapon (M4, Shotgun, etc.).
This is a list of current features of some Rust cheats that have already been released.
Player ESP: Always see every player Zombies ESP: See every zombie Animal ESP: Always see every animal Supply Crate ESP: See every supply crate Lootboxes: Find every loot box Aimbot (coming soon) Speed hack: Run super fast Sphere ESP: See a round sphere around objects Box ESP: See a box around objects New Crosshair: Always have a cross hair on the screen Full adjustable colors for all options