2025 Mariner Wealth Advisors — cloud app breach exposed 8,995 client records
Data compromised
Names, dates of birth, Social Security numbers, and account numbers (varies by client)
Technical writeup
Mariner Wealth Advisors, LLC reported to the Maine Attorney General that a criminal third party accessed three employees’ cloud applications November 21, 2025, downloading files with personally identifiable information for 8,995 clients, discovered November 24. Exposed fields included names, birth dates, Social Security numbers, and account numbers. Written notifications went out May 29, 2026 with 12 months of credit monitoring; the firm reported no evidence of misuse at filing time.
Root cause
Criminal third party accessed three employees’ cloud applications and downloaded client files