Microsoft Defender For Office 365 — Cyber Threats, Attacks & Incidents

Threat entity extracted from intelligence sources

Frequency
3
occurrences
First Seen
December 30, 2025
Last Seen
June 17, 2026

Microsoft Defender For Office 365 is a technology platform tracked across 3 threat clusters and 3 intelligence report mentions on ThreatCluster. First observed December 30, 2025; most recent activity June 17, 2026.

Related Threat Clusters

Recent Intelligence Reports

  • Microsoft says you don’t need another email security tool; experts say, not so fast — Csoonline · June 17, 2026
  • Spear Phishing Market.asp — www.persistencemarketresearch.com · May 11, 2026
  • Inside the Rise of AI-Driven Phishing Attacks Against Microsoft 365 — Linkedin · December 30, 2025

CVSS v3.1 Breakdown