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After Microsoft threatened legal action, a security researcher publishes a new Windows zero-day bug

Wednesday, August 12, 2026


Security researcher Nightmare Eclipse published details of a Windows zero-day vulnerability. Microsoft had previously stated it would pursue legal action against the researcher. The publication follows a pattern of zero-day releases by Nightmare Eclipse over a recent period.

Original reporting: https://techcrunch.com/2026/08/12/after-microsoft-threatened-legal-action-a-security-researcher-publishes-a-new-windows-zero-day-bug/

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