Banking

Medium

investigation open

Updated 16 days ago

Centennial Bank Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving Centennial Bank.
•Discovered on September 17, 2026.
•Possible data exposed: Full Name, Mailing Address, Date of Birth, Account Information, Customer Identification Numbers, Entity Identification Numbers, Citizenship, Tax Information, Federal Taxpayer ID, Mailing Preference, Occupation, Customer Status, Familial Relations, Bank Branch Details.
•Affects individuals in: Massachusetts.
•Confirmation level: Confirmed by company.

Breach confirmed

The Centennial Bank breach is confirmed. If you may be affected, add your details below and we will take it from there.

Detailed summary

Centennial Bank, including its Happy State Bank division, reported that a Fidelity Information Services associate sent a customer file to an unintended recipient on August 7, 2026. The recipient opened the file on August 10, recognized the error, and notified FIS. FIS reported the incident to Centennial Bank on August 17, 2026. The recipient confirmed deletion on August 14, and the recipient's financial institution issued a certificate of destruction on August 26, 2026.

The file may have contained names, mailing addresses, dates of birth, account information, customer and entity identification numbers, citizenship, tax information including Federal Taxpayer IDs for some individuals, mailing preferences, customer details, and bank branch details. The sources do not state how many Centennial Bank customers were affected. Centennial Bank said it had no indication that the information had been misused and offered affected customers 24 months of identity-monitoring services.

Data possibly involved

Full Name
Mailing Address
Could be combined with other data for identity theft
Date of Birth
Often used in combination with other data for identity theft
Account Information
Customer Identification Numbers
Entity Identification Numbers
Citizenship
Tax Information
Federal Taxpayer ID
Mailing Preference
Occupation
Customer Status
Familial Relations
Bank Branch Details

Company Response Timeline

Response Grade

Notified consumers within 31–60 days

Breach Occurred

Aug 7, 2026

Company Discovered

Aug 17, 2026

Regulator Notified

Unknown

Consumers Notified

Sep 17, 2026

10 days to discover

31 days to notify consumers

Breach Verification Status

Reports Only

Complete

Initial dark web reports of potential breach

Company Confirmed

Current

Company has acknowledged the breach

Regulator Confirmed

Confirmed by regulatory authorities

Note: Breach verification can take time. Information may evolve as more details become available from companies and regulators.

Case Status:

Investigation Open

We're actively investigating this case and seeking affected individuals.

Were you affected? Submit your information below.

Were You Affected By This Breach?

If you are a customer or have received a data breach notification, you may submit your information as part of our ongoing investigation. Submitting your information is free and does not obligate you.

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Check Your Risk Level

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Do you use Centennial Bank?

Yes

What state are you in?

What should I do?

Change your passwords

Update passwords for the affected service and any accounts using the same password

Enable two-factor authentication

Add an extra layer of security to your accounts

Monitor your accounts

Watch for suspicious activity on your financial and online accounts

Watch for phishing attempts

Be cautious of emails or messages claiming to be from the affected company

Consider a credit freeze

Prevent unauthorized access to your credit report

Scan your email for other exposures

Check whether this address shows up in other known breaches. Free, no account.

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Data Shield files removal requests with every broker that accepts an authorized agent, and gives you the exact link or letter for the brokers that only accept requests from you.

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