This paper presents a comprehensive vulnerability analysis of LoRaWAN networks, focusing on the effects of electromagnetic interference (EMI) and power supply disturbance (PSD) faults on network performance. The study begins by outlining the fundamental principles of LoRaWAN, including its architecture, key management, and security features. It then delves into the potential vulnerabilities introduced by EMI and PSD, cause data corruption, and lead to security breaches. Through a series of physical experiments, a developed framework evaluates the impact of these factors on LoRaWAN networks under various conditions. The results reveal that EMI and PSD can significantly degrade the performance of LoRaWAN networks, leading to packet loss, increased latency, and compromised data integrity. Additionally, these vulnerabilities can be exploited by attackers to launch sophisticated attacks. The study also highlights the importance of continuous monitoring and adaptive security measures to ensure the resilience of LoRaWAN networks against EMI and PSD. Finally , this comprehensive vulnerability analysis underscores the need for robust security and reliability measures in LoRaWAN networks to safeguard against the adverse effects of EMI and PSD. The findings contribute to the ongoing efforts to enhance the security and performance of IoT networks, ensuring their reliable operation in diverse and challenging environments.