Mitsui Sumitomo Insurance security incident history
Hacking, data breaches and other security incidents involving Mitsui Sumitomo Insurance, with related coverage.
Mitsui Sumitomo Insurance’s MS Compass leaks around 23,000 customer records
23kImpact: Around 23,000 records belonging to members, seminar applicants and people who submitted enquiries
Unauthorised access to Mitsui Sumitomo Insurance’s corporate information website MS Compass exposed around 23,000 records belonging to members, seminar applicants and people who submitted enquiries. The records included company names, contact names, email addresses, telephone numbers and addresses. The website was temporarily closed.
Related reports: 3 →Supplier breach exposes 228,000 Mitsui Sumitomo Insurance customer records
228kImpact: Approximately 228,000 motor insurance customer records
Unauthorised access to Prestige Core Solution, Mitsui Sumitomo Insurance’s roadside assistance contractor, exposed approximately 228,000 motor insurance customer records. The leaked information included names, addresses, phone numbers, vehicle information, and records of accident and breakdown reports. This incident is separate from the MS Compass breach.
Related reports: 2 →Mitsui Sumitomo Insurance portal breach leaks about 37,000 customer records
37kImpact: Approximately 37,000 customer records
Unauthorised access to Japanese insurer Mitsui Sumitomo Insurance’s policyholder portal resulted in the leak of approximately 37,000 customer records. The leaked information included insurance policy numbers, names, addresses, telephone numbers and email addresses, but did not include credit card or bank account information. The company suspended the related services and conducted an external forensic investigation.
Related reports: 6 →