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Record Microsoft Patch Tuesday, fresh zero

Feeds2.Feedburner •Zeljka Zorz • June 10, 2026

Microsoft marked its largest-ever Patch Tuesday this month, by shipping fixes for nearly 200 vulnerabilities. Within hours, “Nightmare Eclipse”, the researcher behind weeks of escalating Windows exploit releases, dropped a proof-of-concept exploit for a new zero-day: “RoguePlanet”, which abuses a race condition in Windows Defender to spawn a command shell running with SYSTEM-level privileges. Various researchers have confirmed that the PoC exploit works to achieve local privilege escalation. “In initial development, it was confirmed that … More →

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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

Extracted Entities

Record Microsoft Patch Tuesday, fresh zero

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Extracted Entities

Attack Types (1)

CWE Weaknesses (2)

MITRE ATT&CK (2)

Platforms (1)

Vulnerabilities (1)