• November 2025 •

Marquis Software Solutions Data Breach

Last Updated on December 4, 2025

If your information was compromised in the Marquis 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 Marquis data breach as they investigate whether a class action lawsuit can be filed.
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 Marquis breach.

Marquis Data Breach: Lawsuit Investigation

Attorneys working with ClassAction.org are looking into whether a class action lawsuit can be filed in light of the Marquis 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 Marquis data breach or otherwise believe they are affected.

December 4, 2025 – Details Emerge About the Marquis Data Breach

Marquis Software Solutions has notified dozens of United States banks and credit unions that their customer data was exfiltrated in the Marquis data breach that occurred in August 2025.

According to TechCrunch, Marquis boasts on its website more than 700 banking and credit union customers nationwide. The publication reports that at least 400,000 people have so far been confirmed as impacted by the Marquis data breach, as disclosures of the incident were filed in Iowa, Maine, Texas, Massachusetts and New Hampshire. Per TechCrunch, at least 354,000 people in Texas alone were impacted by the cyberattack.

Marquis informed the Maine Attorney General that banking customers with the Maine State Credit Union accounted for the bulk of the company’s data breach notifications in that state.

The number of people impacted by the Marquis data breach is expected to grow as data breach notices are disseminated to other states, TechCrunch states.

According to Marquis, cybercriminals stole customer names, dates of birth, addresses, financial details, tax ID numbers, payment card information and Social Security numbers in the incident, which Marquis linked to the exploitation of a zero-day vulnerability in its SonicWall firewall.

If you received a letter about the Marquis data breach, attorneys working with ClassAction.org would like to hear from you. Fill out the form on this page for free to learn more.

Marquis Security Incident: What Happened?

Marquis Software Solutions, a Texas-based company that provides marketing and compliance software to banks and credit unions, has reported that personal information may have been exposed in a recent data security incident.

After unusual network activity was detected on August 14, 2025, Marquis launched an investigation with the help of cybersecurity specialists. The investigation determined that an unauthorized third party had accessed its systems and may have copied certain files.

The Marquis data breach was limited to the company’s online environment and did not affect the internal systems of the financial institutions it serves, such as Norway Savings Bank and CoVantage Credit Union.

Marquis completed its review of the potentially compromised files on October 27, 2025. Individuals whose information was impacted by the Marquis data breach are being notified directly with more details about what types of data were involved.

What You Can Do After the Marquis Data Breach

If your information was exposed in the Marquis 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 Marquis to ensure they take proper steps to protect the information they were entrusted with.