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Microsoft shares mitigation for YellowKey Windows zero-day

BACKGROUND
1 SIGNALFIRST DETECTED 20 May 2026
Narrative synthesis pending — 1 signal collected.
How the story developed
20 May
7.8
Other feeds and industry voices
14 May
Windows Zero-Days Expose BitLocker Bypasses And CTFMON Privilege Escalation

An anonymous cybersecurity researcher who disclosed three Microsoft Defender vulnerabilities has returned with two more zero-days involving a BitLocker bypass and a privilege

REPORT · WHO · The Hacker NewsOPEN STORY
13 May
Windows BitLocker zero-day gives access to protected drives, PoC released

A cybersecurity researcher has published proof-of-concept (PoC) exploits for two unpatched Microsoft Windows vulnerabilities named YellowKey and GreenPlasma, which are a BitLocker

REPORT · WHO · BleepingComputerOPEN STORY
17 May
Security researcher says Microsoft built a Bitlocker backdoor, releases exploit

<a href="https://news.ycombinator.com/item?id=48168856">Comments</a>

REPORT · WHO · Hacker News Best (RSS)OPEN STORY
Sources
BleepingComputer

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