Falcon Flank: Public Privilege-Escalation Claim Against CrowdStrike Falcon
What security teams need to know about an unverified local elevation-of-privilege proof of concept published against Falcon Sensor, and how to respond without overreacting. On 3 September 2026, an independent researcher publishing as MSNightmare / Chaotic Eclipse / Nightmare Eclipse released a public GitHub repository named FalconFlank. The project is described as a local privilege-escalation proof of concept against CrowdStrike Falcon Sensor on Windows.