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Every business is under siege as France has experienced a series of high-impact incidents that have made headlines well beyond the security community. For IT leaders and Microsoft 365 admins, these French cyberattacks can serve as useful case studies.

In this article we’ll look at the risks, the current state of various attacks against this underlying document storage substrate, and what you can do about it.  

The Monthly Threat Report by Hornetsecurity brings you monthly insights into M365 security trends, email-based threats, and commentary on current events in the cybersecurity space. This edition of the Monthly Threat Report focuses on data from the month of December 2025.