As a zero-day vulnerability in Fortinet's FortiOS highlights the constant need for developers to stay ahead of security threats, New Relic application performance monitoring (APM) empowers them to create targeted alert rules and control their security posture without extensive scanning. By leveraging the APM and Vulnerability Management capabilities, developers can receive real-time alerts on zero-day events, gain broad visibility across their entire environment, assess the impact instantly, and maintain an ongoing, adaptive security posture through continuous analysis and proactive prevention. With New Relic's alerting and applied intelligence features, developers can create customized alert rules to address specific CVEs, navigate the Alert Conditions tab, define conditions based on parameters like error rates or response times, and integrate Vulnerability Management to extend their alert rules. By harnessing these capabilities, developers can unlock the full potential of New Relic APM for proactive security postures and stay ahead of the ever-changing digital landscape.