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RoguePlanet zero

Feeds.4Sysops •IT News • June 10, 2026

A security researcher has released a zero-day exploit named RoguePlanet that targets a race condition within Microsoft Defender. The vulnerability reportedly affects fully patched Windows 10 and Windows 11 systems, including the latest June 2026 security updates. When successfully executed, the exploit allows an attacker to launch a command prompt with SYSTEM-level privileges on the local machine. Source

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Nightmare-Eclipse Banned from GitHub and GitLab for Zero-Day Exploits The anonymous security researcher known as Nightmare-Eclipse has been banned from both GitHub and GitLab due to the release of multiple unpatched Windows vulnerabilities. GitHub terminated the account on May 25, 2026, after the researcher disclosed six exploits, including critical privilege escalation vulnerabilities like BlueHammer and YellowKey. Microsoft accused the researcher of violating coordinated vulnerability disclosure practices, leading to a public feud. Following the GitHub ban, Nightmare-Eclipse moved to GitLab, where they continued to release exploits until being suspended on May 26, 2026. The researcher has threatened further disclosures, claiming Microsoft has left them with no choice. The situation has sparked significant backlash within the cybersecurity community, highlighting tensions between researchers and corporate entities over vulnerability disclosure practices. 86 sources 68

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RoguePlanet zero

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Attack Types (1)

CWE Weaknesses (1)

MITRE ATT&CK (2)

Platforms (2)

Vulnerabilities (1)