I do believe so. Twenty years ago as an curious teen it was easy for me to penetrate various systems and to dox people. Now the security is better but also the attack vectors and tools evolved.
If we aren't talking about oranizations with good security practices or paranoid individuals, it won't take a large organization to break in a target. A good prepared hacker could do it. Maybe not in a few hours or days, but in some time it is doable if that person is sufficiently knowledgeable and determined.
But we have to ask what for? Nobody is going to hack your personal system without having nothing to gain. And even if he has something to gain, the prior condition is for him to know this.