What happened: On August 20, 2017, Mass Mutuals fraud prevention team identified potentiality fraudulent phone action directed toward MassMutual telephone centers. Upon conducting an investigation into that the action identified, it was determined that beginning on August 17, 2017 an unknown perpetrator contacted MassMutual call centers purporting to be two disunite MassMutual insurance agents.The perpetrator requested assistance in resetting those two agents system access credentials (e.g., user name, password, multi-factor authentication). The perpetrator had readily available nonpublic personal information associated with these two agents and, through social engineering tactics, was able to provide such information to the phone center personnel to successfully authenticate as the respective agents resulting in the access credentials being reset. multitude Mutual identified that this individual then used the credentials to access MassMutual business systems that included nonpublic personally identifiable information associated with each agents clients.What information was involved: Your personal info that may have been involved includes your name, Social surety number, MassMutual policy/account number, [address],[date of birth], [and phone number].