Ethical Hacking News
A rogue bug hunter, known as Nightmare Eclipse, has been releasing zero-day vulnerabilities that have caught Microsoft off guard. With a deep grudge against the tech giant, Nightmare Eclipse claims to be an ex-Microsoft employee and is using their knowledge of Windows to expose security flaws in the company's products.
Nightmare Eclipse, a prolific bug hunter, claims to be a disgruntled ex-Microsoft employee. A recently disclosed vulnerability, RoguePlanet, targets Microsoft Defender and allows local privilege escalation. RoguePlanet works against fully patched Windows 10 and Windows 11 systems. Microsoft has faced criticism for its handling of vulnerability disclosures, with Nightmare Eclipse claiming the company ignored his reports and deleted his account. Microsoft initially threatened legal action against individuals conducting or publishing security research, but later stated it had "no intention to pursue action". The impact and severity of RoguePlanet are disputed among cybersecurity experts, with some validating the exploit code and others expressing skepticism.
In a shocking turn of events, the cybersecurity world has been left reeling from the recent disclosures of Nightmare Eclipse, a prolific bug hunter who claims to be a disgruntled ex-Microsoft employee. With a deep understanding of Windows and an even deeper grudge against the tech giant, Nightmare Eclipse has been releasing zero-day vulnerabilities that have caught Microsoft off guard.
The latest vulnerability, known as RoguePlanet, targets Microsoft Defender and works against fully patched Windows 10 and Windows 11 systems. This bug allows local privilege escalation and leads to SYSTEM-level control over an affected machine. According to Nightmare Eclipse, this bug was discovered through a process of reverse engineering and is a result of the company's lack of communication with vulnerability researchers.
Nightmare Eclipse has been a vocal critic of Microsoft's handling of vulnerability disclosures, claiming that the company has ignored reports from researchers like him and refused to communicate with them. In a previous blog post, Nightmare Eclipse wrote about the humiliation he faced when his reports were dismissed by Microsoft, and he even claimed that the company had deleted his Microsoft account after he reported bugs to them.
Despite Microsoft's initial response to these disclosures being widely interpreted as a threat of legal action, the company has since sought to calm the backlash by stating that it has "no intention to pursue action against individuals conducting or publishing security research." However, Nightmare Eclipse has been quick to point out that this statement is nothing but a hollow promise.
The RoguePlanet vulnerability has sparked a heated debate in the cybersecurity community, with many experts weighing in on the implications of this bug. Tharros Labs senior vulnerability analyst Will Dormann, for example, tested the exploit code and found it to be "reportedly not 100% reliable," but it worked on his machine.
ThreatLocker's threat intelligence team also validated the exploit code and said that they were "actively assessing impact, affected systems, and additional mitigations." However, Nightmare Eclipse has taken umbrage with this response, claiming that Microsoft is trying to downplay the severity of the bug and that its responses are nothing but a thinly veiled attempt to silence researchers like him.
As the cybersecurity community continues to grapple with the implications of RoguePlanet, one thing is clear: Nightmare Eclipse's actions have sent a strong message about the need for greater transparency and communication between companies and vulnerability researchers. Whether or not this will lead to meaningful change remains to be seen, but one thing is certain - the world of cybersecurity has just gotten a whole lot more interesting.
Related Information:
https://www.ethicalhackingnews.com/articles/A-Rogues-Revenge-The-Mysterious-Case-of-Nightmare-Eclipse-and-Microsofts-Zero-Day-Vulnerabilities-ehn.shtml
https://www.theregister.com/security/2026/06/10/nightmare-eclipse-publishes-new-windows-defender-zero-day/5253725
Published: Wed Jun 10 21:48:51 2026 by llama3.2 3B Q4_K_M
