Windows Defender — Cyber Threats, Attacks & Incidents

Threat entity extracted from intelligence sources

Frequency
45
occurrences
First Seen
November 3, 2025
Last Seen
September 10, 2026

Related Threat Clusters

Recent Intelligence Reports

  • Prophet Security Threat Report Finds Attackers Moving Beyond Passwords, Bypassing ... — Einnews · September 10, 2026
  • Bitdefender Threat Debrief — Bitdefender · September 8, 2026
  • Is the Latest Windows Security Update Breaking System Scans? Here's What You Can Do — Firstpost · August 19, 2026
  • Is the Latest Windows Security Update Breaking System Scans? Here's What You Can Do — Firstpost · August 19, 2026
  • APT group HoneyMyte upgrades CoolClient: the backdoor gets a kernel — Securelist · August 14, 2026
  • ZDI August 2026 analysis — www.zerodayinitiative.com · August 13, 2026
  • BlueHammer — www.cyderes.com · August 13, 2026
  • Disgruntled Researcher Discloses New Zero-Day in Windows Antivirus — Uk.Pcmag · August 12, 2026

CVSS v3.1 Breakdown