Frontier AI models like Claude Mythos are transforming cybersecurity, collapsing the timeline between vulnerability discovery and exploitation. AI now identifies and weaponizes vulnerabilities faster than traditional defenses, turning technical challenges into board-level risks. For CISOs, the priority is clear: focus on the small fraction of confirmed, weaponized vulnerabilities that pose real threats. Acting quickly is no longer optional—it’s the only way to stay ahead of attackers in this accelerated landscape.