This case study examines the ethical, privacy, and cybersecurity implications of the Facebook-Cambridge Analytica data leak. The issue arose when Aleksandr Kogan collected data from Facebook users through the 'This is your digital life' app, which was then used by Cambridge Analytica for political purposes, allegedly in favor of Donald Trump's presidential campaign. The analysis considers privacy laws like GDPR and the Federal Trade Commission Act, highlighting the responsibilities of companies like Facebook and Cambridge Analytica in protecting user data. The study concludes that both companies breached privacy laws, ethical principles, and cybersecurity standards, offering a lesson on the importance of data security and privacy in the digital age.