• April 2026 •

M&T Bank Data Breach

Last Updated on April 22, 2026

If your information was compromised in the M&T Bank data breach, you may be able to start a class action to collect money for the harm you’ve suffered.

• Keep reading for more information

At A Glance

What's Going On?: Attorneys need to hear from people affected by the M&T Bank data breach as they investigate whether a class action lawsuit can be filed.
What You Can Do: If you believe your information may have been compromised in the M&T Bank data breach, fill out the form on this page to learn more about the investigation and how you can help.
Does This Cost Anything?: It costs nothing to get in touch or to talk to someone about your rights.
What Can I Get?: If filed and successful, a class action lawsuit could provide consumers with money for any harm resulting from the M&T Bank breach.

M&T Bank Data Breach: Lawsuit Investigation

Attorneys working with ClassAction.org are looking into whether a class action lawsuit can be filed in light of the M&T Bank data breach.

As part of their investigation, they need to hear from individuals who had their information exposed in the incident, including those who received notice of the M&T Bank data breach or otherwise believe they are affected.

M&T Bank Security Incident: What Happened?

M&T Bank has reported that a security incident involving a third-party service provider has compromised customer information. M&T Bank’s own systems were not impacted.

A sample notification letter (pictured below) states that in August 2025, the third-party service provider, whose system contained M&T customer personal data, experienced a data breach. Subsequently, M&T Bank worked with the provider to determine the affected data. According to a report to the Massachusetts Office of Consumer Affairs and Business Regulation, the M&T Bank data breach compromised Social Security numbers, financial account information, and credit/debit card numbers.

M&T Bank operates 1,236 branches and ATM-only locations in Connecticut, Delaware, Florida, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Vermont, Virginia, West Virginia, and the District of Columbia.

What You Can Do After the M&T Bank Data Breach

If your information was exposed in the M&T Bank data breach, attorneys want to hear from you. You may be able to start a class action lawsuit to recover compensation for loss of privacy, time spent dealing with the breach, out-of-pocket costs, and more.

A successful case could also force M&T Bank to ensure they take proper steps to protect the information they were entrusted with.

Affected by the M&T Bank data breach? Fill out the form on this page today.