AI Summary

A Windows zero-day vulnerability has been disclosed by the group Nightmare Eclipse, which they have dubbed 'LegacyHive'. The vulnerability, known as 'LegacyHive', allows for arbitrary code execution on Windows systems. Nightmare Eclipse has released a proof-of-concept exploit for the vulnerability, but the researcher behind the disclosure has since removed the exploit to prevent immediate exploitation. The removal of the exploit suggests that the researcher is attempting to balance disclosure with responsible security practices, allowing security experts to prepare for potential exploitation without immediately putting vulnerable systems at risk.

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