Financial services data breaches expose Social Security numbers, bank and investment account numbers, credit information, transaction histories, and other highly sensitive financial data held by banks, credit unions, investment firms, and lenders. These breaches carry a direct and immediate risk of financial fraud, unauthorized account access, and long-term identity theft, since the exposed data often includes exactly what’s needed to open new lines of credit or drain existing accounts. Financial institutions are also frequent targets of third-party vendor breaches, where a breach at a smaller service provider exposes customer data across multiple banks or investment firms at once. Affected individuals may include current and former account holders, loan applicants, and investment clients, regardless of whether they still have an active relationship with the breached institution. This page tracks confirmed data breaches at banks, investment firms, and other financial services companies, including what data was exposed, which companies notified regulators, and what affected individuals can do next to secure their accounts and understand their legal options.
Quontic Bank Acquisition Corp. notified customers that two former employees retained customer records after leaving the company, exposing personal information to unauthorized access.
Quontic Bank Data Breach Exposes Customer Names and Personal Records Read More »
Ernst & Young is notifying clients that a hacker breached a third-party support ticket system and stole documents containing personal and financial tax information.
Ernst & Young Data Breach Exposes Client Tax and Financial Information Read More »
Melvin Mora & Associates, a California tax preparation firm, suffered a data breach exposing clients’ Social Security numbers, bank account details, and other sensitive tax information.
Mercadien PC Certified Public Accountants disclosed a data breach affecting over 402,741 clients, exposing Social Security numbers, financial account details, and other sensitive personal data.
Mercadien Data Breach Exposes Social Security Numbers and Financial Information Read More »
Onset Financial notified regulators and affected individuals that an unauthorized party accessed company systems in May 2025, exposing Social Security numbers, driver’s license numbers, and financial account information.
Onset Financial Data Breach Exposes Social Security Numbers and Financial Records Read More »
The Vanguard Group notified Massachusetts regulators that a data breach compromised consumer Social Security numbers, raising concerns about the true scope of affected individuals.
Vanguard Data Breach Exposes Social Security Numbers Read More »
Frankel Loughran Starr & Vallone, an accounting and tax advisory firm, has disclosed a data breach that exposed the names, Social Security numbers, driver’s license numbers, and financial account numbers of dozens of clients.
A compromised user account at law firm Fried Frank led to the theft of sensitive files containing Social Security numbers, passport numbers and financial data belonging to 659 JPMorgan Chase-connected individuals.
Fried Frank Data Breach Exposes Social Security Numbers and Passport Numbers Read More »
EP Wealth Advisors notified over 53,000 clients that a February 2026 data breach exposed their names, Social Security numbers, dates of birth, and financial account information.
An accounting firm based in Wethersfield, Connecticut, confirmed that hackers accessed its network for nearly a month and stole sensitive personal and financial data belonging to more than 16,000 people.