I think it is quite a bit more than that. Don't forget that along with Miya and Yume (Musubi's alter ego), she was once part of the original disciplinary squad. I don't remember what chapter it was in, but it was implied that Matsu brought down multiple helicopters attempting to assault the island down at once. In addition to her hacking ability, she's rather competent in other areas too. Where Miya, Yume/Musubi, and Karasuba excel at close-range combat, Musubi must be equally destructive at long-range, non-contact combat.

Of course, we also have no idea what her contract verse power is either.