Frost Bank third-party software tool 'commercial lockbox' breached

Frost Bank, the subsidiary of San Antonio-based Cullen/Frost Bankers Inc., had its commercial lockbox cybersecurity breached, the company announced.
The now-quarantined slice of the computer infrastructure used by the bank was accessed by an unauthorized user, the bank told its customers and investors March 16. The lockbox software was a third-party system, and the bank hired a "leading cybersecurity firm" to work on the incident. Cullen/Frost (NYSE: CFR) executives alerted authorities to the se