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"We do not yet know the scope of the intrusion, but we are working closely with information security consultants and law enforcement to determine its source and impact," the university stated. "We are not aware at this time of any protected health information, personal financial information or Social Security numbers being compromised, and Stanford does not conduct classified research."
Still, the university is clearly taking the issue seriously -- an alert on the university's home page states clearly, "STANFORD COMMUNITY: Go to the Accounts page to change your SUNet password."
Because the investigation is ongoing, the university hasn't provided any additional information on the the nature of the breach.