Actually it is possible if there is a person who will find a way to do that. Familiar about the upgrading viruses and anti virus their? It is like that.
As per my knowledge I do not find the any issues with the wallets by hacking or hijacking issues. Please do not spread rumour that bitoin wallet can be hacked. It is not at all possible if you secure your wallet with the private key bro.
If you have the wallet without the private key and amount on the exchanges you will be having the possible way to loose the money. If you use the paper wallet and hardware wallet you will never loose any fund.