Top Cyber Attacks December 2020

This article summarizes major December 2020 cybersecurity incidents, highlighting the SolarWinds supply-chain compromise affecting ~18,000 networks (attributed to Russian intelligence), a large Dental Care Alliance breach exposing over 1,000,000 patient records, an Egregor ransomware attack against Metro Vancouver’s TransLink that exfiltrated payroll and banking data, and a T‑Mobile exposure of CPNI for ~200,000 customers; it provides sector impacts, exposed data types, dates/locations, and high-level mitigation recommendations.