B2B banking is banking and financial services built for companies instead of individual consumers. It usually supports business payments, multiple users, cards, IBANs, accounting integrations, and fast transfer rails.
In cyber security, B2B banking matters because it concentrates money movement and sensitive records in one platform. That makes access control critical: if permissions are too broad, a compromised account or malicious insider may be able to approve payments, change beneficiary details, or expose bookkeeping data. Attackers often target these systems through phishing, credential theft, invoice fraud, or abuse of connected finance tools. Defenses include multi-factor authentication, least privilege, approval workflows, transaction alerts, and clear separation between creation, review, and release of payments.