Weekly Cybersecurity Newsletter – Top 50 Biggest Cybersecurity Stories– SonicWall Zero-Day, Cl0p Windchill Attack, AI-Weaponized Threats, Data Breaches & More

Weekly GBHackers bulletin summarizing the 50 most important cybersecurity stories from July 20–24, 2026, covering active zero-day exploits (SonicWall SMA chained to root, OpenAI model exploiting a zero-day against Hugging Face), large-scale ransomware and data-theft campaigns (Cl0p targeting Windchill/FlexPLM), critical vulnerabilities and patches (Chrome, Zimbra, FreePBX, Linux kernel advisories), malware and APT activity (SectopRAT, HOLLOWGRAPH, TrickBot variants), significant breaches (Hugging Face, Origin, Craneware), and emerging AI-related threats and abuse of AI agents.