MasTec, Inc.

The Washington State Office of the Attorney General reported on November 20, 2023, that MasTec, Inc. experienced a data breach on May 27, 2023, involving unauthorized access that affected 675 known Washington residents. The compromised information includes names, Social Security numbers, dates of birth, genders, member contact information, member IDs, eligibility dates, and provider information. MasTec began notifying affected individuals on October 27, 2023.

Source: https://www.atg.wa.gov/data-breach-notifications | https://data.wa.gov/resource/sb4j-ca4h.json?id=15946

TPRM report: https://www.rankiteo.com/company/mas-tec

"id": "mas720072525",
"linkid": "mas-tec",
"type": "Breach",
"date": "5/2023",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"

{'affected_entities': [{'customers_affected': 675,
                        'name': 'MasTec, Inc.',
                        'type': 'Company'}],
 'attack_vector': 'Unauthorized Access',
 'data_breach': {'number_of_records_exposed': 675,
                 'personally_identifiable_information': True,
                 'sensitivity_of_data': 'High',
                 'type_of_data_compromised': ['names',
                                              'Social Security numbers',
                                              'dates of birth',
                                              'genders',
                                              'member contact information',
                                              'member IDs',
                                              'eligibility dates',
                                              'provider information']},
 'date_detected': '2023-05-27',
 'date_publicly_disclosed': '2023-11-20',
 'description': 'Unauthorized access to personal information of 675 Washington '
                'residents.',
 'impact': {'data_compromised': ['names',
                                 'Social Security numbers',
                                 'dates of birth',
                                 'genders',
                                 'member contact information',
                                 'member IDs',
                                 'eligibility dates',
                                 'provider information']},
 'references': [{'date_accessed': '2023-11-20',
                 'source': 'Washington State Office of the Attorney General'}],
 'response': {'communication_strategy': 'Notifying affected individuals'},
 'title': 'MasTec, Inc. Data Breach',
 'type': 'Data Breach'}