Cybersecurity stands at a strategic turning point—with two transformative shifts redefining the landscape. First, the rapid rise of agentic AI and autonomy is challenging long-standing assumptions about control, oversight, and threat detection. Second, cybersecurity is no longer seen solely as a defensive function—it is increasingly expected to enable business goals, innovation, and organizational agility. These shifts have exposed fundamental limitations in current performance measurement frameworks. Traditional Key Performance Indicators (KPIs) have been built for an era of manual control and risk mitigation. But they now fail to reflect the speed, scale, and autonomy of modern digital environments. They also often overlook cybersecurity’s growing business role in enabling innovation, product integrity, regulatory trust, operational continuity, and market access. This white paper—developed by the Future of Cybersecurity Knowledge Community—offers a practical blueprint to help organizations modernize cybersecurity performance management, enabling senior leaders to adapt to next-generation AI-driven architectures and evolving business objectives