The US Postal Service says employees’ personal data, including Social Security numbers, may have been compromised. Dow Jones reported the total number of staff potentially affected at more than 500,000.
In a statement Monday, the USPS said the FBI was leading an investigation. It also said customer credit card data did not appear to be at risk.
“The intrusion is limited in scope and all operations of the Postal Service are functioning normally,” the statement said. “Postal Service transactional revenue systems in post offices as well as on usps.com where customers pay for services with credit and debit cards have not been affected by this incident.”
Customers who contacted the postal service customer care center with an inquiry via telephone or e-mail between Jan. 1, 2014, and Aug. 16, 2014 are also at risk. The intrusion compromised names, addresses, telephone numbers, email addresses and other information for those customers who may have provided this information, according to the statement.
“At this time, we do not believe that potentially affected customers need to take any action as a result of this incident,” USPS said. “We have recently implemented additional security measures designed to improve the security of our information systems…”