Where does the Co-op Credit Union case file come from?

Every entry is taken from the breach report Co-op Credit Union 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: Co-op Credit Union Data Breach

This file collects the dated facts on record for the Co-op Credit Union incident. The state report is dated October 21, 2025.

Timeline

October 21, 2025Report filed in MassachusettsDate the notice was lodged with the Massachusetts Attorney General.

Case facts

Filing state: Massachusetts
Date reported: October 21, 2025
Receiving office: Massachusetts Attorney General

Case notes

Co-op Credit Union, a financial institution operating in Massachusetts, has formally reported a data breach incident to the state's Attorney General. The disclosure, filed on October 21, 2025, indicates that an investigation into the nature and extent of the compromise is currently underway.

While the specific categories of personal information affected by this breach remain unspecified in the public filing, financial institutions like Co-op Credit Union typically maintain a broad spectrum of sensitive member data. This can include various details essential for banking services and regulatory compliance.

For individuals whose data was involved, the incident means that their personal information may have been accessed by unauthorized parties. This situation underscores the ongoing security challenges faced by organizations holding extensive consumer data.

If you receive a notification regarding this incident from Co-op Credit Union, it is advisable to take protective measures. These commonly include reviewing financial statements and account activity for any suspicious transactions, monitoring your credit reports for unauthorized accounts or inquiries, and remaining cautious about unsolicited communications that request personal details.

This report serves as an official record of the breach filing, based on information provided to regulatory bodies. Affected individuals should refer to communications directly from Co-op Credit Union for specific details relevant to their situation.

Questions about this case file

Where does the Co-op Credit Union case file come from?: Every entry is taken from the breach report Co-op Credit Union 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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