The Good, the Bad and the Ugly in Cybersecurity - Week 21
SentinelOne, Monday, May 25th, 2026
Weekly cybersecurity roundup covering law enforcement crackdowns on cybercrime, new macOS malware threats, and active Microsoft Defender zero-day exploits.
This cybersecurity news roundup highlights three major developments: international law enforcement operations dismantled cybercrime infrastructure across 13 countries, disrupting malware distribution and phishing campaigns affecting thousands of victims; researchers identified a new macOS infostealer variant called 'Reaper' that uses sophisticated social engineering and Apple-branded spoofing to steal credentials and cryptocurrency wallet data; and Microsoft disclosed two actively exploited zero-day vulnerabilities in its Defender anti-malware suite that allow attackers to gain SYSTEM privileges and trigger denial-of-service conditions on unpatched Windows systems.