Yes, this happened to me a few months ago, and to the rest of my family. One day I couldn't log in to any of the accounts, getting a message to call customer service. They said there had been a breach, and their response to this is to create a new account, move all your miles to it along with your history, and have you start using this new account. There is one "gotcha" though; if you are enrolled in the "Instant Status Pass" promotion, this doesn't work so you need to keep 2 parallel accounts until you're done with it. Your miles accrue in your original account, but it is locked for redemption, and you can redeem from the new account. This means calling to get miles transferred over for redemption until the Instant Status Pass period is over (for me November 30) and the accounts can be fully merged. Other than that we've had no issues; miles and status both transferred to the new account for my wife, who is Gold.