This technical report provides an overview of the Cyber Risk Index and its significance in assessing organizational risk. It outlines how the Trend Vision One Cyber Risk Exposure Management (CREM) platform calculates risk scores based on the likelihood of a threat actor gaining access to corporate environments and the potential impact of such events. The report emphasizes the importance of continuous monitoring of cyber assets, including devices and applications, to maintain an accurate risk score. It also discusses the zero-trust security model, which necessitates ongoing assessment of risks across diverse environments, including cloud services and mobile devices. The Cyber Risk Index serves as a key performance indicator, allowing organizations to track their cybersecurity posture over time, support accountability, and facilitate benchmarking against peers. Additionally, it highlights the critical factors of confidentiality, integrity, and availability in evaluating asset value, providing definitions and levels for each factor to guide organizations in their risk management strategies.