A global financial services firm, operating under strict GDPR and CCPA compliance mandates, discovers a sophisticated phishing campaign that bypasses their previously effective multi-factor authentication (MFA) system, exploiting a newly identified zero-day vulnerability in a widely used authentication protocol. This necessitates an immediate and significant shift in their security posture to protect sensitive client data. Which behavioral competency is most prominently displayed by the ISMS Lead Implementer if they swiftly redirect resources, initiate the exploration of alternative authentication technologies, and revise the incident response plan to reflect this emergent threat?