In today's digital landscape, security is crucial to protect against successful attacks that target unknown assets, often referred to as "shadow IT". According to recent research, CISOs are finding it increasingly difficult to manage attack surfaces, with two-thirds citing that the task has become more challenging over the past two years. To address this issue, it's essential to avoid common mistakes, such as not having a comprehensive understanding of one's attack surface, failing to prioritize vulnerability management, and neglecting to implement effective incident response plans. By being aware of these pitfalls and taking proactive measures, organizations can improve their security posture and reduce the risk of successful attacks.