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README.md
README.md

UnDefend (CVE-2026-45498)

Defender signature update pipeline freeze. Prevents Defender from updating its malware definitions, leaving the system blind to new threats.

  • CVE: CVE-2026-45498
  • Target: Windows Defender Antimalware Platform
  • Patched: May 2026 (Defender Antimalware Platform v4.18.26040.7)
  • CISA KEV deadline: June 3, 2026

PoC Status

No standalone PoC repository survived the GitHub/GitLab account bans (May 23-27, 2026). The original code was part of the Nightmare Eclipse / Chaotic Eclipse accounts. If a mirror surfaces, add it here.

References