## Windows 11 Zero-Days Published: Bitlocker Bypass and Privilege Escalation Exploit Surface Days Before Promised Follow-Up
A security researcher with a documented history of publishing vulnerability research has released two functional Windows 11 zero-day exploits through GitHub repositories, triggering renewed scrutiny of Microsoft's patching timelines and enterprise security posture.

The first exploit, catalogued under the repository name YellowKey, implements a BitLocker bypass technique capable of undermining Windows 11 full-disk encryption protections. The second, published as GreenPlasma, functions as a local privilege escalation mechanism that could allow an authenticated attacker to elevate from standard user permissions to high-privilege system access. Both proof-of-concept implementations are now publicly available, lowering the barrier for threat actors seeking to develop working exploits. The researcher behind the releases, operating under the Nightmare-Eclipse handle, has previously published other vulnerability research including tools named BlueHammer and RedSun, suggesting a pattern of deliberate public disclosure outside standard coordinated disclosure practices.

Security practitioners face immediate pressure to assess exposure across Windows 11 deployments. BitLocker bypass capabilities pose particular risk to scenarios involving lost or stolen hardware, where encryption is the primary defense against data exfiltration. The privilege escalation component compounds these risks by potentially enabling lateral movement following initial access. The researcher has indicated that another significant release is planned for the coming week, suggesting this disclosure represents an ongoing campaign rather than an isolated event. Organizations relying on Windows 11 should prioritize reviewing BitLocker deployment configurations, monitoring for unusual authentication patterns, and evaluating network segmentation controls as a precautionary measure pending official guidance from Microsoft.
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- **Source**: r/cybersecurity
- **Sector**: The Lab
- **Tags**: zero-day, Windows 11, Bitlocker bypass, privilege escalation, vulnerability disclosure
- **Credibility**: unverified
- **Published**: 2026-05-13 00:48:20
- **ID**: 82434
- **URL**: https://whisperx.ai/en/intel/82434