On December 16, 2013, the California Office of the Attorney General reported a data breach involving Massachusetts Mutual Life Insurance Company (MassMutual) that occurred on December 3, 2013. The breach involved the inadvertent disclosure of personal identifying information, including names, addresses, dates of birth, Social Security numbers, and retirement plan details of individuals. Affected individuals were offered a two-year subscription to Equifax Credit Watch for monitoring personal and credit information.
Source: https://oag.ca.gov/ecrime/databreach/reports/sb24-43534
TPRM report: https://www.rankiteo.com/company/massmutual-financial-group
"id": "mas711072625",
"linkid": "massmutual-financial-group",
"type": "Breach",
"date": "12/2013",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'industry': 'Financial Services',
'location': 'Massachusetts',
'name': 'Massachusetts Mutual Life Insurance Company '
'(MassMutual)',
'type': 'Insurance Company'}],
'attack_vector': 'Inadvertent Disclosure',
'data_breach': {'personally_identifiable_information': ['names',
'addresses',
'dates of birth',
'Social Security '
'numbers'],
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Personal Identifying '
'Information']},
'date_detected': '2013-12-03',
'date_publicly_disclosed': '2013-12-16',
'description': 'Inadvertent disclosure of personal identifying information '
'including names, addresses, dates of birth, Social Security '
'numbers, and retirement plan details.',
'impact': {'data_compromised': ['names',
'addresses',
'dates of birth',
'Social Security numbers',
'retirement plan details']},
'references': [{'date_accessed': '2013-12-16',
'source': 'California Office of the Attorney General'}],
'title': 'MassMutual Data Breach',
'type': 'Data Breach'}