SECURITY Affairs’ weekly newsletter, Round 573 by Pierluigi Paganini – INTERNATIONAL EDITION, was published on 19 April 2026. The issue gathers a selection of highlighted security stories from Security Affairs, including Hidden VMs: how hackers leverage QEMU to stealthily steal data and spread malware, Nexcorium Mirai variant exploits TBK DVR flaw to launch DDoS attacks, and Microsoft Defender under attack as three zero-days, two of them still unpatched, enable elevated access.
Other featured items include Kyrgyzstan-based crypto exchange Grinex shuts down after $13.7M cyber heist, DraftKings hacker sentenced to prison, ordered to pay $1.4 Million, and Operation PowerOFF: 53 DDoS domains seized and 3 Million criminal accounts uncovered. The round also notes U.S.
CISA adds a flaw in Apache ActiveMQ to its Known Exploited Vulnerabilities catalog, Cisco fixed four critical flaws in Identity Services and Webex, Cookeville Regional Medical Center hospital data breach impacts 337,917 people, AI platform n8n abused for stealthy phishing and malware delivery, and From clinics to government: UAC-0247 expands cyber campaign across Ukraine.