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Zero-dayMay 19, 2026

Windows Zero-Day Barrage Continues After Patch Tuesday

Security researcher discloses three Windows zero-days (YellowKey, GreenPlasma, MiniPlasma) following Patch Tuesday.

Summary

A security researcher has disclosed three previously unknown Windows vulnerabilities—YellowKey, GreenPlasma, and MiniPlasma—adding to a barrage of zero-day exposures over the past six weeks. These disclosures follow Microsoft's regular Patch Tuesday cycle and suggest either active exploitation or coordinated vulnerability research. The timing and naming convention hint at potential nation-state involvement or a systematic vulnerability disclosure campaign.

Entities

Windows (product)