Microsoft: RoguePlanet zero-day in Defender — patch underway

Colleagues, a cybersecurity alert: Microsoft has confirmed a RoguePlanet zero-day in Defender.

- CVE‑2026‑50656 (CVSS 7.8) — local privilege escalation in the Malware Protection Engine.
- Researcher Chaotic Eclipse published a PoC: a race condition yielding a SYSTEM shell; PoC works even with protection enabled.
- Microsoft is investigating and preparing a security update.

Why it matters: local privilege escalation threatens endpoints — deploy patches promptly.

How will you manage Defender updates in your organization?

#cybersecurity #MicrosoftDefender #vulnerabilities