The openness of Radio Access Networks (RAN) coupled with AI has positioned O-RAN as the next-generation solution for telecommunications networks. On one hand, its intelligence, flexibility, and customization have paved the way for innovative, convenient, and cost-effective usage scenarios and opportunities. However, on the other hand, it has also led to new types of cybersecurity attacks and potential security threats. This presentation will investigate into the vulnerabilities arising from new components and interfaces within O-RAN, with a particular focus on the threats posed by the integration of AI. Finally, we will further discuss corresponding protection mechanisms.