The biggest cybersecurity and cyberattack stories of 2023

2023 saw numerous high-impact cybersecurity incidents: massive data thefts (notably the MOVEit/Clop attacks exposing millions), widespread ransomware campaigns (ESXiArgs, BlackCat, Black Basta), supply-chain compromises (3CX compromise, Barracuda ESG exploitation), sophisticated zero-day and zero-click exploits (Operation Triangulation/TriangleDB), large DDoS operations by hacktivists (Anonymous Sudan), and pervasive credential-stuffing/infostealer activity affecting major services; the report summarizes scale, actors, techniques, and notable technical details for these events.