There is someone who can crack the password of Innosilicon miner according to this thread https://bitcointalk.org/index.php?topic=2549898.0.

This funbuxx can crack the password but it seems he is not online for a long time.

I read some of his posts and according to him, you need to extract or disassemble the firmware and look for the encrypted password then crack it. I don't know which tool he use to crack it.