Penn State is sending out letters to about 15,800 people whose Social Security numbers may have been discovered by hackers, the university said in a statement Wednesday.
Officials found that a computer in the Outreach Market Research and Data office was communicating with a bot controller, a type of malicious software that allows someone to gain complete control of the affected computer.
At one time, the computer contained a database of Social Security numbers. In 2005, Penn State officials removed the database when they stopped using Social Security numbers. However, an archived copy remained undetected on the computer’s cache.
The university said it has no evidence that unauthorized individuals have accessed the information.
Penn State also sent out warning letters last week, when 9,766 individuals were affected by a similar breach on a University Libraries computer.