Cybersecurity briefing — 2026-03-23

Here's your PlainSec briefing for Sunday, March 23rd.

• Interlock Ransomware Uses Zero-Day to Compromise Firewalls
• Critical SharePoint Flaw Being Actively Exploited
• CISA Orders Federal Agencies to Patch n8n RCE
• Attackers Shift to RCE Bugs to Compromise Clouds
• Apple pushes background security fix for WebKit same‑origin bypass
• Rockwell Vulnerability Allowing Remote ICS Hacking Exploited in Attacks
• Oracle Patches Critical Unauthenticated RCE in Fusion Middleware
• Musician Pleads Guilty to Millions in Streaming Royalty Fraud Using AI