The California Office of the Attorney General reported a data breach involving Massachusetts Mutual Life Insurance Company (MassMutual) on June 4, 2013. The breach occurred on May 8, 2013, due to an inadvertent disclosure of personal identifying information, including names and Social Security numbers, to a non-affiliated third party, affecting an unspecified number of individuals.
Source: https://oag.ca.gov/ecrime/databreach/reports/sb24-41920
TPRM report: https://www.rankiteo.com/company/massmutual-financial-group
"id": "mas1022072725",
"linkid": "massmutual-financial-group",
"type": "Breach",
"date": "5/2013",
"severity": "60",
"impact": "3",
"explanation": "Attack with significant impact with internal employee data leaks"{'affected_entities': [{'industry': 'Insurance',
'location': 'Massachusetts',
'name': 'Massachusetts Mutual Life Insurance Company '
'(MassMutual)',
'type': 'Insurance Company'}],
'attack_vector': 'Inadvertent Disclosure',
'data_breach': {'personally_identifiable_information': True,
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Names',
'Social Security numbers']},
'date_detected': '2013-05-08',
'date_publicly_disclosed': '2013-06-04',
'description': 'The California Office of the Attorney General reported a data '
'breach involving Massachusetts Mutual Life Insurance Company '
'(MassMutual) on June 4, 2013. The breach occurred on May 8, '
'2013, due to an inadvertent disclosure of personal '
'identifying information, including names and Social Security '
'numbers, to a non-affiliated third party, affecting an '
'unspecified number of individuals.',
'impact': {'data_compromised': ['Names', 'Social Security numbers']},
'references': [{'source': 'California Office of the Attorney General'}],
'title': 'MassMutual Data Breach',
'type': 'Data Breach'}