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Agentic AI has moved from experimental research to live production environments at unprecedented speed, outpacing nearly every technology security leaders have encountered in recent history. Distinguishing themselves from standard chatbots that merely respond and pause, autonomous agents architect multi-step workflows, interface with tools and APIs, maintain contextual memory, and execute operations with minimal human intervention. While this autonomy provides immense value for cyber defense, it simultaneously creates an entirely new category of organizational risk. This analysis explores the core tenets of securing agentic AI, examines why autonomous systems bypass legacy security controls, details emerging exploitation techniques, and highlights the frameworks teams are adopting to govern this expanding attack surface. Agentic systems are characterized by their ability to plan, make decisions, and initiate actions toward specific objectives across complex sequences with limited oversight. This represents a fundamental shift from the reactive prompt-and-response paradigms typical of generative AI, in which human instruction is required for each individual output.