This is not common, re-add 2FA as soon as possible and contact Blockchain.info. I would probably move any bitcoins out of that address too, run a virus scan, check your sent emails in case the request is still there, change your email password, essentially do everything to stop them from getting into your account.
Yeah, thanks, I did the password changes, re-enabled 2-factor authentication etc as soon as I got the email. They hadn't gained access to my wallet, or hadn't taken anything from it at least. It's an old wallet I hadn't used for nearly a year, with not much coin in it.
It might be a phishing email to get you to click and log in. Have you checked? Post the email details here including the actual email address it was sent from.
Yeah, I wondered about that too. I did my ususal logging in to blockchain.info with my linux USB boot drive, and typed in the wallet identifier. 2-factor authentication was in deed disabled.
from: Blockchain <
no-reply@blockchain.info>
to: my email
subject: Two Factor Authentication Disabled
mailed-by: mail.blockchain.info
Signed by: mail.blockchain.info