Nightmare-Eclipse Drops Yet Another Microsoft Exploit, RoguePlanet
BLUF
A critical Windows Defender exploit enabling system takeover is now publicly available due to an ongoing researcher feud.
NEWS
The actor known as Nightmare-Eclipse released the RoguePlanet proof-of-concept, targeting a vulnerability that bypasses Windows Defender. This release continues a pattern of disclosing exploits against Microsoft security products without waiting for patches.
Why I Care
Enterprises using Windows Defender are at risk of immediate compromise if systems remain unpatched against this specific vulnerability. Public PoCs accelerate weaponization by malicious actors who can now easily exploit the flaw to gain administrative control.
Next Steps
IT administrators must prioritize patching Windows Defender vulnerabilities immediately and verify deployment across all endpoints within 24 hours. Security operations teams should update detection rules to identify exploitation attempts associated with the RoguePlanet PoC.
Source: Dark Reading ·