18 Attack Surface Reduction Examples to Improve Cybersecurity | UpGuard

This guide explains the concept of an organization’s attack surface and provides a practical, step-by-step framework for Attack Surface Reduction (ASR), including asset discovery, eliminating unnecessary exposure, least privilege, segmentation, and hardening. It distinguishes Attack Surface Management (ASM) from Vulnerability Management (VM), offers 18 actionable examples spanning device security, password policies, Shadow IT, Zero Trust, and incident response, and underscores the importance of continuous monitoring and automation (e.g., EASM, real-time alerts, risk scoring). The document also highlights supporting platforms and techniques such as UpGuard, Microsoft Defender ASR rules, and network/cloud policy management to sustain ongoing exposure reduction.