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

Threat entity extracted from intelligence sources

Frequency
7
occurrences
First Seen
December 30, 2025
Last Seen
September 4, 2026

Related Threat Clusters

Recent Intelligence Reports

  • ASCII smuggling challenges email phishing filters, Microsoft warns | news — Scworld · September 4, 2026
  • ASCII smuggling crosses over from AI prompt injection to phishing evasion — Blogs.Microsoft · September 3, 2026
  • Best email security solutions for MSPs in 2026: a buyer's guide — Acronis · August 18, 2026
  • Standard MFA Won't Stop Hackers Who Route Microsoft 365 Phishing Through Google — Techtimes · August 7, 2026
  • 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