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Investor's Crypto Daily > Blog > Headlines > Cryptocurrency News > US banks hit by massive third-party data breach, sensitive information of 672 075 people potentially exposed
Cryptocurrency News

US banks hit by massive third-party data breach, sensitive information of 672 075 people potentially exposed

Last updated: March 21, 2026 4:41 pm
By Ronald Dupree 2 Min Read
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The massive breach of data at a digital marketing and communication firm that serves US banks affected more than 500,000 Americans.

Marquis Software Solutions has filed a complaint with the Office of the Maine attorney general claiming that it was the victim of a serious data breach affecting 672 075 people.

Marquis claims that an unauthorised third party has accessed their systems and stolen files from their database.

The firm has not specified the type of data that could have been stolen, but says it is only a breach in its own database. It does not appear to affect the systems of its clients.


We detected suspicious activities on or about August 14th, 2025. Later, our investigation determined it to be the result of an incident involving data security. We immediately began an investigation after learning about the incident and enlisted the help of cybersecurity experts. Also, we immediately notified the law enforcement…


“Our customer examined the files affected on December 10th, 2025. They then worked to identify and validate individuals who may have had their information affected. Our customer also worked quickly to get the most current mailing addresses of individuals.”

Marquis encourages those affected to monitor their accounts, and to immediately notify authorities of any suspicious activities. They also offer a one-year free identity monitoring service, including identity insurance, from Epiq Privacy Solutions ID.

The vendor in the banking sector says that it is not aware of any fraud or identity theft involving the data exposed.

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Sources of Images include Pixabay Creative Commons & Midjourney

As new information becomes available, this post US banks hit by massive third-party data breach, sensitive information of 672 075 people potentially exposed may change.

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