Frost Bank data breach

Clerk's notes

Frost Bank formally notified California authorities on May 20, 2026, regarding a data security incident that originated on December 6, 2025. This filing indicates that an unauthorized party may have gained access to sensitive customer information maintained by the financial institution. The investigation into this breach is currently under 'monitoring' by regulators.

According to the official report, the categories of data potentially exposed include Full Name, Social Security Number, Financial Account Number, Routing Number, Date of Birth, Credit Score Information, Transaction History, and Mailing Address. The compromise of such comprehensive personal and financial identifiers creates a significant risk for affected individuals, potentially leading to identity theft, fraudulent transactions, or account takeover.

As a financial institution, Frost Bank is bound by stringent federal and state regulations, including the Gramm-Leach-Bliley Act, which mandate robust security protocols to protect nonpublic personal information. The occurrence of this data breach suggests potential deficiencies in the safeguards designed to prevent unauthorized access to customer data, making it crucial for affected individuals to understand their rights.

If you received a data breach notification letter from Frost Bank, it serves as formal acknowledgment that your private financial information was compromised while under their care. Receiving such a notification is an important step in establishing legal standing to explore potential claims. Our firm is actively reviewing cases related to this incident.

We encourage anyone affected by the Frost Bank data breach to consider their options. Understanding the full impact and your legal avenues is important. You can request a free case review to determine how this breach may affect you and what steps you can take.

If a notification letter about this breach reached you, see every California data breach on file or browse all cases.