KLM Airlines

KLM Airlines experienced a data breach involving a third-party system, exposing limited personal details of customers, including names, contact information, Flying Blue membership numbers, and email subject lines. While no sensitive data like passwords, credit card numbers, or passport details were compromised, the exposed information could be misused for targeted phishing scams. The breach did not affect core systems, and corrective measures were taken to secure the system. Customers were advised to remain vigilant against suspicious communications.

Source: https://hackread.com/klm-customer-data-breach-linked-third-party-system/

TPRM report: https://www.rankiteo.com/company/klm

"id": "klm304080925",
"linkid": "klm",
"type": "Breach",
"date": "8/2025",
"severity": "50",
"impact": "2",
"explanation": "Attack limited on finance or reputation"

{'affected_entities': [{'customers_affected': 'Frequent flyers and other '
                                              'customers',
                        'industry': 'Aviation',
                        'location': 'France/Netherlands',
                        'name': 'KLM Airlines',
                        'size': 'Multinational',
                        'type': 'Airline'}],
 'attack_vector': 'Third-party system compromise',
 'customer_advisories': 'Email notifications sent to affected customers',
 'data_breach': {'data_exfiltration': 'Yes',
                 'personally_identifiable_information': 'First and last names, '
                                                        'contact details, '
                                                        'Flying Blue '
                                                        'membership numbers '
                                                        'and tier levels',
                 'sensitivity_of_data': 'Moderate',
                 'type_of_data_compromised': 'Personal details'},
 'description': 'KLM Airlines notified customers about a data breach that '
                'exposed certain personal details after a third-party system '
                'the company relies on was accessed by an unauthorized party. '
                'The breach involved a limited set of personal data from '
                'previous interactions with their customer service team, '
                'including first and last names, contact details, Flying Blue '
                'membership numbers and tier levels, and subject lines from '
                'service-related emails.',
 'impact': {'brand_reputation_impact': 'Potential damage due to phishing risks',
            'data_compromised': 'First and last names, contact details, Flying '
                                'Blue membership numbers and tier levels, '
                                'subject lines from service-related emails',
            'identity_theft_risk': 'Possible due to exposed personal details',
            'systems_affected': 'Third-party platform'},
 'initial_access_broker': {'entry_point': 'Third-party system'},
 'investigation_status': 'Ongoing',
 'lessons_learned': 'Importance of securing third-party systems and monitoring '
                    'for phishing risks',
 'motivation': 'Potential misuse in targeted scams',
 'post_incident_analysis': {'corrective_actions': 'Secured the third-party '
                                                  'system and implemented '
                                                  'measures to prevent future '
                                                  'incidents',
                            'root_causes': 'Third-party system vulnerability'},
 'recommendations': 'Customers advised to change account usernames and '
                    'passwords, enable multi-factor authentication, and verify '
                    'suspicious communications through official KLM channels',
 'references': [{'source': 'Hackread.com'}],
 'regulatory_compliance': {'regulations_violated': 'EU privacy laws',
                           'regulatory_notifications': 'Report filed with the '
                                                       'Dutch Data Protection '
                                                       'Authority'},
 'response': {'communication_strategy': 'Email notifications to affected '
                                        'customers, advisories on official '
                                        'channels',
              'containment_measures': 'Secured the third-party system',
              'incident_response_plan_activated': 'Yes',
              'remediation_measures': 'Corrective steps taken to prevent '
                                      'repeat incidents',
              'third_party_assistance': 'Yes'},
 'stakeholder_advisories': 'Customers advised to be cautious of phishing '
                           'attempts',
 'title': 'KLM Airlines Data Breach',
 'type': 'Data Breach'}