The threat landscape is shifting from isolated technical vulnerabilities toward autonomous, identity-centric, and supply-chain-enabled attack ecosystems. AI agents are becoming both enterprise assets and offensive tools, creating new risks around prompt injection, excessive privilege, non-human identities, observability, and autonomous decision-making. At the same time, attackers are exploiting trusted brands, software repositories, CI/CD pipelines, mobile applications, and cloud identities to establish initial access and move laterally. The convergence of agentic AI and identity security makes traditional perimeter-based controls increasingly inadequate.