CNB Bank & Trust Data Breach Investigation

Turke & Strauss LLP, a leading data breach law firm, is investigating CNB Bank & Trust, N.A. regarding its recent data breach. The CNB Bank & Trust data breach involved sensitive personal information belonging to an undetermined number of individuals.


CNB Bank & Trust is a full-service independent community bank based in Illinois. Created by the consolidation of four banks in 2011, CNB Bank & Trust can trace its roots back to 1854 with the founding of Cornerstone Bank & Trust, N.A., the oldest continuously active bank charter in Illinois. Today, CNB Bank & Trust provides a variety of banking products and services, including checking and savings accounts, loans and credit, wealth and investment management services, financial advising, and other financial products. Headquartered in Carlinville, Illinois, CNB Bank & Trust serves 17 communities in Illinois and Missouri and employs over 200 individuals.


Recently, a third-party service provider of CNB Bank & Trust, Fiserv discovered that it had experienced a data breach in which sensitive personal information may have been accessed and acquired. Through its investigation, Fiserv determined that an unauthorized actor may have accessed and acquired this sensitive information through a vulnerability in the MOVEit file sharing platform between May 27 and May 31, 2023. As a result, CNB Bank & Trust began notifying individuals whose information may have been impacted by the breach. The exact type of personal information potentially exposed has not been made publicly available by CNB Bank & Trust. However, according to state reporting guidelines, “personal information” can include the following types of information:

  • Name
  • Social Security number
  • Driver’s license number
  • Credit or debit card number
  • Medical information
  • Health insurance information

If you received a breach notification letter from CNB Bank & Trust, N.A.:

We would like to speak with you about your rights and potential legal remedies in response to this data breach. Please fill out the form, below, or contact us at (608) 237-1775 or

If you were impacted by the CNB Bank & Trust data breach, you may consider taking the following steps to protect your personal information.

  1. Carefully review the breach notice and retain a copy;
  2. Enroll in any free credit monitoring services provided by CNB Bank & Trust, N.A.;
  3. Change passwords and security questions for online accounts;
  4. Regularly review account statements for signs of fraud or unauthorized activity;
  5. Monitor credit reports for signs of identity theft; and
  6. Contact a credit bureau(s) to request a temporary fraud alert.

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