SEATTLE (AP) — The Washington state Auditor’s Office says a data breach may have exposed the personal information of more than 1 million residents who filed for unemployment last year _ or who had fraudulent claims filed on their behalf. The breach involved third-party software used by the Auditor’s Office to transmit files. The software vendor, Accellion, announced last month that it had been attacked in December. State Auditor Pat McCarthy says those potentially affected include people who filed for unemployment benefits from Jan. 1 to Dec. 10, 2020. The Auditor’s Office had collected the files to investigate how the Employment Security Department managed to pay out hundreds of millions of dollars in fraudulent claims.