0
Deep & Emerging Tech·September 18, 2026·1 min read

Keep seeing strange meetings and events in your calendar? It might be because calendar-based phishing has jumped 33,000% since May — and they work even if the email is sent to spam

Share

A 33,000% spike in ICS-based phishing means your calendar is now a primary attack surface, not a side channel. Security teams should treat calendar invites like email — enforce filtering, user training, and default-deny for external auto-adds.