UScellular

US mobile carrier in UScellular was hacked in December 2021 and its data was compromised in the attack.

The personal information of 405 clients was stolen and the attackers also ported some of the affected customers' numbers.

The company immediately disconnected the computer accessed by unauthorized individuals from the internet to contain the attack.

Source: https://www.bleepingcomputer.com/news/security/uscellular-discloses-data-breach-after-billing-system-hack/

TPRM report: https://scoringcyber.rankiteo.com/company/uscellular

"id": "usc123827222",
"linkid": "uscellular",
"type": "Breach",
"date": "12/2021",
"severity": "80",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"

{'affected_entities': [{'customers_affected': '405',
                        'industry': 'Telecommunications',
                        'location': 'United States',
                        'name': 'UScellular',
                        'type': 'Mobile Carrier'}],
 'data_breach': {'data_exfiltration': 'Yes',
                 'number_of_records_exposed': '405',
                 'personally_identifiable_information': 'Yes',
                 'type_of_data_compromised': 'Personal Information'},
 'date_detected': 'December 2021',
 'description': 'US mobile carrier UScellular was hacked in December 2021 and '
                'its data was compromised in the attack. The personal '
                'information of 405 clients was stolen and the attackers also '
                "ported some of the affected customers' numbers. The company "
                'immediately disconnected the computer accessed by '
                'unauthorized individuals from the internet to contain the '
                'attack.',
 'impact': {'data_compromised': 'Personal Information'},
 'response': {'containment_measures': 'Disconnected the computer from the '
                                      'internet'},
 'title': 'UScellular Data Breach',
 'type': 'Data Breach'}