Mazda Motor Corporation and Mazda USA: Mazda discloses security breach exposing employee and partner data

Mazda Confirms Data Breach Exposing Employee and Business Partner Information

Mazda Motor Corporation, one of Japan’s largest automakers with an annual production of 1.2 million vehicles and nearly $24 billion in revenue, disclosed a security incident involving unauthorized access to a warehouse management system. The breach, detected in December, exposed 692 records containing sensitive data belonging to employees and business partners.

The attackers exploited a vulnerability in a system used for parts procurement from Thailand, which did not store customer information. According to Mazda’s statement, the compromised data included user IDs, full names, email addresses, company names, and business partner IDs. While no misuse of the exposed information has been confirmed, the company acknowledged the heightened risk of phishing and scams targeting affected individuals.

In response, Mazda reported the incident to Japan’s Personal Information Protection Commission and engaged an external cybersecurity firm to investigate. The company also implemented enhanced security measures, including reduced internet exposure, security patches, increased monitoring, and stricter access controls. No ransomware group has publicly claimed responsibility for the attack.

However, in November 2025, the Clop ransomware group listed Mazda.com and MazdaUSA.com on its leak site, alleging compromise of both the Japanese automaker and its U.S. subsidiary though Mazda has not officially confirmed a data breach. Further details remain pending as the investigation continues.

Source: https://www.bleepingcomputer.com/news/security/mazda-discloses-security-breach-exposing-employee-and-partner-data/

Mazda Motor Corporation cybersecurity rating report: https://www.rankiteo.com/company/mazda-motor-corporation

Mazda Motor Europe cybersecurity rating report: https://www.rankiteo.com/company/mazda-motor-europe

"id": "MAZMAZ1774304621",
"linkid": "mazda-motor-corporation, mazda-motor-europe",
"type": "Breach",
"date": "12/2025",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"

{'affected_entities': [{'customers_affected': 'Employees and business partners',
                        'industry': 'Automotive',
                        'location': 'Japan',
                        'name': 'Mazda Motor Corporation',
                        'size': '1.2 million vehicles annually, $24 billion '
                                'revenue',
                        'type': 'Automaker'}],
 'attack_vector': 'Vulnerability Exploitation',
 'data_breach': {'number_of_records_exposed': '692',
                 'personally_identifiable_information': 'User IDs, full names, '
                                                        'email addresses, '
                                                        'company names, '
                                                        'business partner IDs',
                 'sensitivity_of_data': 'High (user IDs, full names, email '
                                        'addresses, company names, business '
                                        'partner IDs)',
                 'type_of_data_compromised': 'Personally Identifiable '
                                             'Information (PII)'},
 'date_detected': '2024-12',
 'description': 'Mazda Motor Corporation disclosed a security incident '
                'involving unauthorized access to a warehouse management '
                'system. The breach exposed 692 records containing sensitive '
                'data belonging to employees and business partners, including '
                'user IDs, full names, email addresses, company names, and '
                'business partner IDs. The attackers exploited a vulnerability '
                'in a system used for parts procurement from Thailand.',
 'impact': {'brand_reputation_impact': 'Potential risk of phishing and scams '
                                       'targeting affected individuals',
            'data_compromised': '692 records',
            'identity_theft_risk': 'Heightened risk due to exposed PII',
            'systems_affected': 'Warehouse management system (parts '
                                'procurement)'},
 'investigation_status': 'Ongoing',
 'post_incident_analysis': {'corrective_actions': 'Reduced internet exposure, '
                                                  'security patches, increased '
                                                  'monitoring, stricter access '
                                                  'controls',
                            'root_causes': 'Vulnerability in warehouse '
                                           'management system'},
 'ransomware': {'ransomware_strain': 'Clop (alleged, unconfirmed)'},
 'references': [{'source': 'Mazda Motor Corporation Statement'}],
 'regulatory_compliance': {'regulatory_notifications': 'Reported to Japan’s '
                                                       'Personal Information '
                                                       'Protection Commission'},
 'response': {'communication_strategy': 'Reported to Japan’s Personal '
                                        'Information Protection Commission',
              'containment_measures': 'Reduced internet exposure, security '
                                      'patches, stricter access controls',
              'enhanced_monitoring': True,
              'incident_response_plan_activated': True,
              'remediation_measures': 'Enhanced security measures, increased '
                                      'monitoring',
              'third_party_assistance': 'External cybersecurity firm'},
 'title': 'Mazda Data Breach Exposing Employee and Business Partner '
          'Information',
 'type': 'Data Breach',
 'vulnerability_exploited': 'Unknown vulnerability in warehouse management '
                            'system'}