Nintendo

Nintendo, a leading Japanese multinational video game and entertainment company, confirmed a significant data breach after a hacker group claimed unauthorized access to its internal network. The threat actors allegedly exfiltrated confidential corporate data, though the exact scope of the stolen information such as employee records, proprietary game development details, financial documents, or customer-related data was not publicly disclosed. The breach raises concerns over potential intellectual property theft, operational disruptions, or reputational damage, given Nintendo’s high-profile status in the gaming industry. While the company acknowledged the incident, it did not specify whether the attack involved ransomware, targeted vulnerabilities, or a direct cyber assault. The breach underscores the growing risks faced by global enterprises in safeguarding sensitive internal data from increasingly sophisticated cyber threats.

Source: https://www.teiss.co.uk/news/nintendo-confirms-data-breach-after-hacker-group-claims-theft-of-sensitive-corporate-data-16587

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

"id": "nin4533145102225",
"linkid": "nintendo",
"type": "Breach",
"date": "10/2025",
"severity": "60",
"impact": "3",
"explanation": "Attack with significant impact with internal employee data leaks"

{'affected_entities': [{'industry': ['Video Games',
                                     'Entertainment',
                                     'Consumer Electronics'],
                        'location': 'Kyoto, Japan (HQ)',
                        'name': 'Nintendo Co., Ltd.',
                        'size': 'Multinational (Large)',
                        'type': 'Corporation'}],
 'data_breach': {'data_exfiltration': True,
                 'sensitivity_of_data': 'High (Corporate)',
                 'type_of_data_compromised': ['Confidential Corporate Data']},
 'description': 'Japanese multinational video game and entertainment company, '
                'Nintendo, suffered a significant data security incident after '
                'a group of threat actors claimed to have breached its '
                'internal network and stole confidential company data.',
 'impact': {'brand_reputation_impact': 'Potential (due to public disclosure)',
            'data_compromised': ['Confidential Corporate Data'],
            'systems_affected': ['Internal Network']},
 'initial_access_broker': {'high_value_targets': ['Corporate Data']},
 'investigation_status': 'Ongoing (implied by public disclosure)',
 'response': {'communication_strategy': 'Public Disclosure'},
 'threat_actor': ['Unknown Hacker Group'],
 'title': 'Nintendo Confirms Data Breach After Hacker Group Claims Theft of '
          'Sensitive Corporate Data',
 'type': ['Data Breach', 'Unauthorized Access']}