The Top Cyber Attacks of October 2021

October 2021 cybersecurity roundup: several high-impact incidents occurred across industries — Sinclair suffered a Macaw/WastedLocker-style ransomware outage, Twitch leaked 125GB of source code and streamer financials, Ferrara experienced ransomware that disrupted production, MalKamak deployed a stealthy RAT against aerospace and telecom targets, and Syniverse disclosed a five-year undetected breach potentially affecting millions. The report stresses attacker sophistication, long dwell times, cross-industry impact, and the critical need for network-wide security controls, vulnerability management, and improved detection and response.