Microsoft Addresses Critical Zero-Day Vulnerabilities: YellowKey, GreenPlasma, and MiniPlasma
In June 2026, Microsoft addressed three critical zero-day vulnerabilities—YellowKey, GreenPlasma, and MiniPlasma—disclosed by the researcher 'Nightmare Eclipse.' YellowKey (CVE-2026-45585) allowed attackers with physical access to bypass BitLocker encryption via the Windows Recovery Environment. GreenPlasma (CVE-2026-45586) and MiniPlasma (CVE-2020-17103) were privilege escalation flaws in the Collaborative Translation Framework and Cloud Files Mini Filter Driver, respectively, enabling local attackers to gain SYSTEM privileges on fully patched Windows systems. These vulnerabilities were patched in Microsoft's June 2026 Patch Tuesday updates. ([bleepingcomputer.com](https://www.bleepingcomputer.com/news/microsoft/microsoft-patches-yellowkey-greenplasma-miniplasma-zero-days/?utm_source=openai)) The disclosure of these vulnerabilities highlights ongoing challenges in vulnerability management and coordinated disclosure practices. The public release of proof-of-concept exploits prior to patches underscores the need for robust security measures and prompt patch management to mitigate potential threats.
Kill Chain