Researcher Drops MiniPlasma Windows Exploit for Unpatched 2020 CVE

A security researcher has released an exploit called MiniPlasma that targets a Windows vulnerability from 2020, claiming Microsoft never actually patched it despite issuing fixes in December 2020. The vulnerability in the Windows Cloud Filter driver allows attackers to escalate privileges and potentially execute system-level code, and testing confirms it still works on Windows 11 systems with the latest May 2026 security updates installed. The researcher, going by Chaotic Eclipse, has been releasing multiple unpatched Windows exploits recently, expressing frustration with how Microsoft handles vulnerability reports.