H-ISAC TLP White: Daily Cyber Headlines - October 21, 2025

Today’s Headlines:   

Leading Story

• Over 266,000 F5 BIG-IP Instances Exposed to Remote Attacks

Data Breaches & Data Leaks 

• Data Breach Hits Security Company Verisure, Impact Considered Limited

Cyber Crimes & Incidents

• American Airlines Subsidiary Envoy Compromised in Oracle Campaign

Vulnerabilities & Exploits  

• PoC Exploit Released for Windows Server Update Services Remote Code Execution Vulnerability
• Vulnerability in Dolby Decoder Can Allow Zero-Click Attacks

Trends & Reports

• AI-Driven Social Engineering To Be a Top Cyber Threat for 2026, ISACA Survey Reveals

Privacy, Legal & Regulatory

• SIM Farm Dismantled in Europe, Seven Arrested
• Tech Industry Unites Behind Bipartisan Effort to Urgently Reauthorize US Cyber Threat Information Sharing Law 

Upcoming Health-ISAC Events

• Global Monthly Threat Brief   
  • Americas - October 28, 2025, 12:00-01:00 PM ET
  • European – October 29, 2025, 03:00-04:00 PM CET
  • Fall Americas Summit – Carlsbad, California – December 1-5, 2025