All I asked is if they were going to address the MDS vulnerability with a BIOS update to the Z270I motherboard. The replies I got on the MSI forums from other user of the stock board were not helpful (and in some cases rude). But it's down to MSI to police there forums :D:
They sent me a PM asking me to submit a ticket, and asked for full system specs (which I did send them). The above link to a BIOS was what they sent.
I have no intention of applying this BIOS unless Corsair give me the go ahead to do so - and as stated in my post, I advice all CS-9000011 (2017/2018 I7-7700K Corsair One) users to not use it as well. My only reason for posting the link was to get the information to the development team and see what they think. If the Development team have a copy of the file from MSI, I am happy to edit my post to remove the link. I have it downloaded, so if need be I can email it direct to Corsair if you want.
I hope it's of some help!