Fallout 76 PC players are currently in danger of losing their armour and weapons due to a new hack. The hack lets those who use it steal the items you have equipped as well as those in your inventory by coming within render distance.
There's a new hack in Fallout 76 that gives those who use it the ability to steal items out of your inventory. The hackers are not able to touch your caps, scrip, access to various locations and stash box/scrap box items. Person to person trading is also still safe.
Items you should be scared of losing to the exploit are your weapons, armour and everything else you've got in your inventory. The Pip-Boy can be stolen using the new hack as well as it technically is an item in your inventory. The hacker can steal your items if he/she comes within render distance to you.
You won't be able to tell which player is using the hack so your best bet, for now, is to avoid playing on public servers. The best bet is to take advantage of your of a friend's Fallout 1st subscription and play on a private server until the whole thing blows over.
Another way of keeping your possessions safe is to store your weapons and armour.
"There is currently an exploit on PC that can allow players to steal all items from your inventory. Stick to private worlds with people you trust or stash your valuables. The only items stealable are the items inside your inventory and what you have equipped, caps, scrip, stuff stored in your stash + vendors is safe. Keep an eye out."