Change the password immediately or reset if necessary
If you can still login to the exposed account, then change to a strong password [PDF] immediately to prevent further unauthorized access. For Andrew accounts, use Change Andrew Password.
If you cannot login to the account, then try using the site's password reset procedure if any. For Andrew accounts, use Forgot Your Password?
If you still cannot get into the account, contact the site's support desk. For Andrew accounts, call the Computing Services Help Center at 412-268-HELP (4357).
2.
Report the issue to your account issuer's support desk and request an activity audit
Contact the site's support desk and tell them what happened.
Ask the support desk to help you audit your account for unauthorized activity. For Andrew accounts, call the Computing Services Help Center at 412-268-HELP (4357).
3.
Reverse any unauthorized activity
Ask your site's support desk to help you undo any unauthorized activity. For Andrew accounts, call the Computing Services Help Center at 412-268-HELP (4357).
If possible, ask them to monitor your account for further strange activity.
If possible, enable email, phone, or text message activity alerts and check those contact methods regularly.
If your account contains personal information for anyone except yourself, your family and your friends, notify your site's support desk. For Andrew accounts, call or email the Information Security Office at 412-268-2044 or iso@andrew.cmu.edu.