Where does the Greenfield Cooperative Bank case file come from?

Every entry is taken from the breach report Greenfield Cooperative Bank 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: Greenfield Cooperative Bank Data Breach

This file collects the dated facts on record for the Greenfield Cooperative Bank incident. The state report is dated September 5, 2025.

Timeline

September 5, 2025Report filed in MassachusettsDate the notice was lodged with the Massachusetts Attorney General.

Case facts

Filing state: Massachusetts
Date reported: September 5, 2025
Receiving office: Massachusetts Attorney General

Case notes

Greenfield Cooperative Bank, a financial institution based in Massachusetts, reported a data security incident on September 5, 2025. The filing indicates that unauthorized actors gained access to its network environment, leading to a compromise of sensitive personal information.

While the specific types of data exposed in this breach have not been detailed in public filings, financial institutions commonly hold a wide range of personal information. The breach filing confirms that customer data was involved, and individuals should be aware of the potential for their information to be at risk.

The compromise of personal information can lead to various risks, including identity theft and financial fraud. When such incidents occur, affected individuals may face an increased risk of their data being misused.

Individuals who receive notification about this incident from Greenfield Cooperative Bank should monitor their accounts and credit reports closely for any unusual activity. It is advisable to consider placing a fraud alert or security freeze on credit files as a proactive measure.

Regularly reviewing financial statements and promptly reporting any suspicious transactions to your bank or credit card company can help mitigate potential harm. Staying informed about the ongoing investigation from Greenfield Cooperative Bank is also recommended.

Questions about this case file

Where does the Greenfield Cooperative Bank case file come from?: Every entry is taken from the breach report Greenfield Cooperative Bank 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.

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Timeline

Case facts

Case notes

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