Cybersecurity Report 2025

The Cybersecurity Report by Hornetsecurity is an annual analysis of the Microsoft 365 threat landscape based on real-world data collected and studied by Hornetsecurity’s dedicated Security Lab team.

Hornetsecurity’s cybersecurity solutions process more than four and a half billion monthly emails. By analysing the threats identified in these communications, combined with a detailed knowledge of the wider threat
landscape, the Security Lab reveals major security trends and threat actor actions. It can help make informed projections for the future of Microsoft 365 security threats, enabling businesses to act accordingly.

Those findings and data are contained within this report.

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