Adobe Data Breach (2013)

Adobe, the multinational software company, suffered a major data breach in October 2013 that initially seemed to impact nearly 3 million user accounts. However, the situation turned out to be far more severe than initially estimated, with the number of compromised accounts eventually ballooning to about 150 million. The breach occurred when attackers accessed user passwords and the source code for certain Adobe products, such as Cold Fusion. The compromised data, which included almost 150 million encrypted passwords, was subsequently found on a website frequented by cyber criminals. The Adobe data breach is considered one of the worst in history due to the massive number of records affected and the company's use of questionable encryption techniques.