This study examines the adoption of virtual assistants in multinational companies operating in Nigeria, exploring their multifaceted implications for operational efficiency, customer engagement, and data security. Virtual assistants have emerged as indispensable tools for streamlining administrative tasks, enhancing customer service, and facilitating remote collaboration, particularly amidst the challenges posed by the COVID-19 pandemic. However, alongside the benefits come significant concerns regarding data security and user privacy. Leveraging a comprehensive review of existing literature and case studies of multinational companies in Nigeria, this study identifies key security and privacy challenges associated with virtual assistant implementations, including the risk of data breaches, privacy infringements, and malicious attacks. Furthermore, the study proposes a series of proactive strategies for mitigating these risks, emphasizing the importance of robust security measures, regular audits, adherence to privacy regulations, transparent data handling practices, user education, and continuous monitoring. By implementing these recommendations, multinational companies can effectively safeguard sensitive data, protect user privacy rights, and foster trust and accountability in virtual assistant deployments.