Microsoft vs. Zero-Day Researcher: "Bone-Crushing" Revelation Expected on July 14

The Escalation of Zero-Day Disclosures The

conflict between Microsoft and security researcher “Nightmare Eclipse” (also known as Chaotic Eclipse) has entered a new phase. This researcher has already disclosed six zero-day vulnerabilities in Windows, three of which have reportedly been exploited. Now, the situation is becoming even more serious, as Nightmare Eclipse has announced plans for a new revelation on July 14, promising a “bone-crushing shock.”

The Six Disclosed Vulnerabilities In a blog

post published on May 27, Microsoft officially acknowledged the six vulnerabilities disclosed by Nightmare Eclipse, naming them as follows: - RedSun - UnDefend - BlueHammer - YellowKey - GreenPlasma - MiniPlasma Microsoft claims that none of these vulnerabilities were reported through official channels before being disclosed. The researcher had published proof-of-concept (POC) code on GitHub (a Microsoft subsidiary) and GitLab accounts, which were subsequently removed from those platforms.

Three Vulnerabilities Already Exploited Of

particular concern are the vulnerabilities BlueHammer, RedSun, and UnDefend. Reports confirm that attackers began exploiting these vulnerabilities immediately after Nightmare Eclipse released the POC code for each. This serves as a stark example of the real-world harm caused by uncoordinated vulnerability disclosures. Among the remaining three vulnerabilities, YellowKey (CVE-2026-45585) has yet to receive a patch. Microsoft has raised its risk assessment to “highly likely to be exploited,” citing the existence of practical POC code as the basis for this evaluation.

Microsoft’s Response and Legal Warning In its

blog post, Microsoft unequivocally condemned this type of uncoordinated disclosure: “We strongly oppose such actions. We stand against any disclosure that occurs outside of appropriate coordination and poses harm to customers and the digital ecosystem.” Furthermore, Microsoft hinted at potential legal action by mentioning collaboration with law enforcement agencies: “Uncoordinated disclosure of proof-of-concept code for unpatched vulnerabilities, which puts it into the hands of malicious actors, can never be justified for any reason. Such actions have serious real-world consequences… The Digital Crimes Unit will continue to pursue litigation against such actors and those who enable their malicious activities, working with law enforcement agencies worldwide as necessary.”

The Researcher’s Claims and Allegations of

“Humiliation” On the other hand, Nightmare Eclipse has their own perspective. In a recent statement, the researcher described the breakdown in communication with Microsoft: “When I actively sought communication, you rejected me, humiliated me, and insulted me in front of others.” The researcher claims that their account with the Microsoft Security Response Center (MSRC) was terminated. If true, this would mean that they were effectively stripped of the means to report vulnerabilities through official channels. Furthermore, they allege that they were publicly disparaged through the CVE-2026-45585 advisory.

What Will Happen on July 14?

The most anticipated moment is the “bone-crushing shock” that Nightmare Eclipse has vowed to reveal on July 14. While specific details remain unknown, based on past behavior, it is widely speculated that this could involve the disclosure of a new zero-day vulnerability affecting Windows. Given that three of the six previously disclosed vulnerabilities remain unpatched, the release of additional zero-day vulnerabilities would significantly heighten the risk to Windows users.

The Debate Over Coordinated Disclosure This

incident has reignited long-standing debates about the proper approach to vulnerability disclosure. Some in the security research community argue that Microsoft’s failure to maintain open communication with researchers and its tendency to alienate them have contributed to the current situation. On the other hand, publishing POC code for unpatched vulnerabilities exposes ordinary users to direct risks, which many consider ethically unacceptable. The immediate exploitation of some of these vulnerabilities by attackers underscores this concern. When asked by The Register whether Microsoft is considering legal action, whether Nightmare Eclipse is a current or former employee, or whether the MSRC account was indeed terminated, the company declined to comment on all counts.

What Lies Ahead?

The escalating clash between Microsoft and Nightmare Eclipse is becoming a significant issue for the entire cybersecurity industry. Attention remains focused on what the “bone-crushing” revelation on July 14 will entail, as well as what measures Microsoft, potentially in coordination with law enforcement, will take in response.