According to 2020 cyber survey, 32% of websites have exploitable critical and high risk exposure, and it took 50 days to fix the vulnerability; nearly 60% responded they have been "successfully" compromised through email, which caused data leakage, credential leakage, ransomware, and other incidents. During phishing drill, 68% employees of of these companies clicked the links, 23% provided credential, 9% opened the attachment. Public-facing services and email services are the easiest way to be penetrated by hacker. However, most of the enterprises don’t have a visibility to their cyber exposure and period, and are even not aware of being penetrated. In this seminar, OneDegree cybersecurity team is going to clarify common cyber misunderstandings, explain the popular technique utilized by hacker, and how to manage the cyber exposure with limited resources.