Where does the Mutual One Bank June case file come from?

Every entry is taken from the breach report Mutual One Bank June lodged with the Massachusetts Attorney General. Nothing here is estimated.

Why do the incident date and the report date differ?

Companies usually investigate before they report. The gap between the two dates shows how long that took.

What does the records-affected figure count?

It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.

Does this case file change over time?

Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

Case file

Case File: Mutual One Bank June Data Breach

This file collects the dated facts on record for the Mutual One Bank June incident. The state report is dated June 25, 2026.

Timeline

June 25, 2026Report filed in MassachusettsDate the notice was lodged with the Massachusetts Attorney General.

Case facts

Filing state: Massachusetts
Date reported: June 25, 2026
Receiving office: Massachusetts Attorney General

Case notes

Mutual One Bank June, a financial institution providing banking, lending, and wealth management services in Massachusetts, formally reported a security incident to regulators on June 25, 2026. The bank stated that an investigation into the matter is currently underway to determine the full extent of the compromise.

The report indicates that an unauthorized party may have gained access to the bank's network or to third-party vendor platforms it utilizes. This access could have led to the exposure of personal information held by the bank. The specific types of data involved have not been detailed in public filings at this time.

Financial institutions like Mutual One Bank June are entrusted with a vast amount of sensitive personal and financial data. Any unauthorized intrusion into such systems represents a significant risk for the individuals whose information is potentially compromised, raising concerns about potential misuse of their data.

While the investigation is ongoing, individuals who receive notification from Mutual One Bank June regarding this incident should remain vigilant. It is generally advisable to monitor your financial accounts and credit reports for any unusual activity. You should also be cautious of unsolicited communications, such as emails, phone calls, or texts, that request personal information.

Official notifications from the bank will provide further details as they become available. It is important for individuals to review any such communications carefully and follow any guidance provided to help protect their personal information.

Questions about this case file

Where does the Mutual One Bank June case file come from?: Every entry is taken from the breach report Mutual One Bank June lodged with the Massachusetts Attorney General. Nothing here is estimated.
Why do the incident date and the report date differ?: Companies usually investigate before they report. The gap between the two dates shows how long that took.
What does the records-affected figure count?: It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.
Does this case file change over time?: Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

Massachusetts data breaches

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Timeline

Case facts

Case notes

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