Researcher publishes Windows zero-day exploit after Microsoft legal threat

Security researcher Nightmare Eclipse has released details of a new Windows zero-day vulnerability, defying public legal threats from Microsoft. This disclosure is the latest in a series of zero-day bugs published by the researcher. Microsoft had previously warned of potential legal action against Nightmare Eclipse in an attempt to prevent such releases. A zero-day vulnerability is a software flaw unknown to the vendor, making it especially dangerous as no patch exists at the time of disclosure.