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']}