The Middlefield Banking Company

The Middlefield Banking Company experienced a data security incident on or about April 12, 2023. An unauthorized actor accessed systems and acquired files containing names and account numbers of employees and customers between April 11-12, 2023. The bank notified affected individuals on December 21, 2023, offering 12 months of credit monitoring. Federal law enforcement was notified.

Middlefield Banking Company reported a data breach to the Montana Attorney General. The breach was reported on 2023-12-21. The breach occurred from 4/11/2023 to 4/12/2023. 33 Montana residents were affected.

Middlefield Banking Company experienced a data security incident between April 11-12, 2023, where an unauthorized actor accessed systems and acquired files containing employee and customer information. The bank notified federal law enforcement, implemented enhanced security controls, and provided credit monitoring services to affected individuals. 54 New Hampshire residents were notified.

The Middlefield Banking Company experienced a data security incident on April 12, 2023, where an unauthorized actor accessed systems between April 11-12, 2023. The actor acquired files containing names, dates of birth, and passport numbers of employees and customers. The bank engaged outside specialists, notified federal law enforcement, and implemented enhanced security controls. Affected individuals were offered 12 months of credit monitoring.

Middlefield Banc Corp. disclosed via Item 8.01 8-K that its subsidiary, The Middlefield Banking Company, suffered an April 2023 cyber-attack that disrupted computer systems. A forensic review determined that nonpublic information of current/former employees, customers and others was obtained, potentially including names, SSNs, driver's license info, dates of birth, financial account information, medical information, passport numbers, payment card info, and usernames/passwords. The Bank is notifying impacted individuals and offering complimentary identity protection services.

Middlefield Banc Corp. reported a cyber-attack on April 12, 2023, disrupting systems at its subsidiary, The Middlefield Banking Company. The Bank remediated the vulnerability, engaged forensic investigators, and notified law enforcement. The investigation is ongoing to determine if customer data was impacted. No material financial impact is currently expected.