Microsoft faces security community backlash over Nightmare Eclipse

Microsoft’s public threat to pursue criminal charges against the researcher behind six Windows zero-day disclosures has turned a vulnerability dispute into a full-scale backlash from the security community. The researcher, known as Nightmare Eclipse, published weaponized proof-of-concept code for six Windows vulnerabilities between early April and mid-May 2026 without coordinating with Microsoft. Three flaws, BlueHammer
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