---
title: "Microsoft's worst 'Nightmare' unleashes BitLocker bypass 0-day"
url: https://daily.dev/posts/microsoft-s-worst-nightmare-unleashes-bitlocker-bypass-0-day-qmvgptw1o
source_url: https://www.theregister.com/security/2026/06/11/nightmare-eclipse-drops-claimed-bitlocker-bypass-for-microsoft-windows/5254371
type: article
source: "The Register"
published: 2026-06-11T17:52:19.732Z
updated: 2026-06-11T17:52:40.067Z
tags: ["microsoft", "windows", "zero-day"]
reading_time: 4
upvotes: 0
comments: 0
language: en
---

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# Microsoft's worst 'Nightmare' unleashes BitLocker bypass 0-day

**[The Register](https://daily.dev/sources/theregister)** · 4 min read · 0 upvotes · 0 comments

## Summary

A threat actor known as 'Nightmare Eclipse' has released a claimed zero-day exploit that bypasses BitLocker, Microsoft's Windows disk encryption feature. The exploit represents a significant security risk for Windows users relying on BitLocker for data protection.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.theregister.com/security/2026/06/11/nightmare-eclipse-drops-claimed-bitlocker-bypass-for-microsoft-windows/5254371>

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---

Tags: [#microsoft](https://daily.dev/tags/microsoft), [#windows](https://daily.dev/tags/windows), [#zero-day](https://daily.dev/tags/zero-day)

[View this post on daily.dev](https://daily.dev/posts/microsoft-s-worst-nightmare-unleashes-bitlocker-bypass-0-day-qmvgptw1o)