Could hacker change data in one smart contract with out call contract function?

Question

Consider a Contract:

Contract Example{
    uint array[];
    address owner;
    function Example(){
        owner = msg.sender
    }
    function setArray(uint index, uint value) public {
        if (msg.sender == owner){
            array[index] = value;
        }
    }
}

Is there any possible that hacker update array[] directly by generate a specific block. (steer clear of the condition that "only owner can update array")

Answer 1

Anything's possible.

But assuming the basic security of the blockchain is intact, no, nothing but the smart contract itself is allowed to modify its storage.