Risk-Based IT Auditing and Cybersecurity Assurance in Regulated U.S. Organizations: A Review of Governance, Methods, and Outcomes

Risk-based IT auditing and cybersecurity assurance have become central mechanisms for protecting regulated organizations amid evolving digital threats. This review synthesizes peer-reviewed literature on governance structures, auditing methods, and resulting outcomes across key sectors including financial services, capital markets, healthcare, and critical infrastructure. Drawing from a broad body of literature, it examines how regulatory frameworks shape risk identification and control deployment while highlighting assurance practices that contribute to measurable improvements in threat mitigation and compliance. The analysis reveals consistent emphasis on integrated governance approaches alongside persistent implementation tensions, such as mismatches between risk-based ideals and practical application. Key insights underscore the role of adaptive controls, outcome-focused assurance, and sector-specific adaptations in enhancing overall cybersecurity posture. The review also identifies areas where current practices fall short, offering grounded directions for advancing both theory and practice in regulated environments.