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 about 23,000 customer records
23KImpact: About 23,000 records belonging to members, seminar applicants, and people who submitted inquiries
Unauthorized access to Mitsui Sumitomo Insurance’s corporate information website MS Compass exposed about 23,000 records belonging to members, seminar applicants, and people who submitted inquiries. The records included company names, contact names, email addresses, phone numbers, and addresses. The website was temporarily shut down.
Related reports: 3 →Vendor breach exposes 228,000 Mitsui Sumitomo Insurance customer records
228KImpact: Approximately 228,000 auto insurance customer records
Unauthorized access to Prestige Core Solution, Mitsui Sumitomo Insurance’s roadside assistance contractor, exposed approximately 228,000 auto 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
Unauthorized 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, phone 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 →