This report critically analyzes the Facebook-Cambridge Analytica data breach, examining the ethical issues and implications. It begins with an executive summary outlining the core problem: the misuse of user data through the 'open graph' application. The report then provides a detailed background of the case, explaining how Cambridge Analytica obtained and utilized user data. It applies ethical techniques, including a step-by-step analysis using ethical questions to understand the situation, facts, issues, affected parties, and ethical implications. The report delves into the ACS code of ethics, focusing on the public interest, quality of life, honesty, competence, professional development, and professionalism. Finally, it offers recommendations for Facebook to improve security, implement effective policies, and protect user data through advanced security tools. The report concludes by emphasizing the importance of ethical practices in ICT and the need for proactive measures to prevent future data breaches.