If you have a BitTrex account you may have seen that many of your wallets are offline and unusable. BitTrex has done this to address the Intel computer chip flaws known as Meltdown and Spectre. KuCoin and Einstein Exchange exchanges are also taking similar actions as well.
This is being done to protect your accounts so at this point there is no need to worry.
Good luck and good fortune to all!
I've seen lots of wallets down for over a week now. I'm not sure that this exploit was public by that time?
On BitTrex I usually see a couple of my wallets offline for maintenance. I only noticed an alarming amount on Thursday when I signed on and then again on Friday. I'm not sure if I was on the prior days to notice the issue.