NTT Docomo Online Shop and My docomo Breached; Up to ~300,000 Personal Records Exposed

According to Security NEXT, NTT Docomo detected an external intrusion into its Online Shop and My docomo services on November 4, 2026, suspending application procedures on both services for maintenance early the next morning ^[1]. Subsequent investigation confirmed a breach of personal data affecting up to approximately 300,000 records, including names, addresses, mobile and contact phone numbers, and dates of birth ^[1]. The intrusion vector, root cause, and exact scope of leaked data remain under investigation; the company stated it will notify affected customers once clarified, and the service resumption timeline remains undecided ^[1].

Industries mainly affected: Telecom

The intrusion vector, root cause, and exact scope of leaked data remain under investigation; the company stated it will notify affected customers once clarified, and the service resumption timeline remains undecided ^[1].