Zero-day exploit completely defeats default Windows 11 BitLocker protections:
It's not entirely clear how the exploit works. Microsoft says it's investigating.
arstechnica.com/security/2026/05/zero-day-exploit-completely-defeats-default-windows-11-bitlocker-protections/
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| Total Articles | 3 |
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software, data or commands that use a bug or vulnerability to compromise a computer system
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Windows 11 quietly encrypted your entire PC, and one firmware update can lock you out of everything
xda-developers.com/windows-11-quietly-encrypted-your-entire-pc-and-one-firmware-update-can-lock-you-out-of-everything/
Key FactsWindows 11 Device Encryption Can Trigger Unexpected Recovery Lockouts
Sep 14, 2026 · Reading time: ~45 sec.
Summary created with AI assistance · Source: xda-developers.com
Summary created with AI assistance · Source: xda-developers.com
- Since October 2024, Windows 11 24H2 has enabled Device Encryption by default on many clean installs and resets.
- For local accounts, Microsoft says the recovery key is not automatically saved when the device is encrypted.
- BIOS or UEFI updates, TPM changes, and boot-manager modifications can reportedly trigger the 48-digit key prompt.
- Users should save the key before changing Secure Boot or the TPM and suspend BitLocker during those changes.
I've argued time and again that many of the default settings and updates that Windows 11 ships with assume the best interests of the user, but in practice, they can backfire and cause them genuine harm and loss.— Abhinav, author of the article
Microsoft's nemesis drops new zero-day privilege escalation vulnerability — attack grants system-level privileges, but it could already be patched
tomshardware.com/tech-industry/cyber-security/microsofts-nemesis-drops-new-zero-day-privilege-escalation-vulnerability-attack-grants-system-level-privileges-but-it-could-already-be-patched
This Won't End Well for Windows: LegacyHive Points to a Troubling Future: In the latest escalation of a public feud with Microsoft, security researcher Nightmare ...
pcmag.com/news/this-wont-end-well-for-windows-legacyhive-points-to-a-troubling-future
Nightmare-Eclipse Drops Another BitLocker Bypass After YellowKey Patch: Nightmare-Eclipse, the current bane of Microsoft's existence, strike again with new ...
hothardware.com/news/nightmare-eclipse-drops-another-bitlocker-bypass-after-yellowkey-patch
Nightmare Eclipse claims to have found another BitLocker vulnerability: Security researcher "Nightmare Eclipse" has struck again, publishing information about a ...
winfuture.de/news,159287.html
Windows BitLocker exploit sparks messy feud between Microsoft and the researcher who exposed it
techspot.com/news/112576-windows-bitlocker-exploit-sparks-messy-feud-between-microsoft.html
WindowsCentral May 28
"I have proof for every single word": This security researcher's GitHub and Microsoft accounts were deleted after claiming a Windows 11 exploit ...
windowscentral.com/microsoft/security-researcher-github-microsoft-accounts-deleted-windows-11-exploit-bitlocker
Microsoft apparently blames researcher for publicly exposing a Windows 11 Recovery flaw
neowin.net/news/microsoft-apparnetly-blames-researcher-for-publicly-exposing-a-windows-11-recovery-flaw/
Microsoft Mitigates Dangerous YellowKey Tool That Breaks BitLocker: Microsoft has a potential workaround for the recent YellowKey BitLocker exploit ...
hothardware.com/news/microsoft-mitigates-dangerous-yellowkey-tool-that-breaks-bitlocker
YellowKey: Another BitLocker backdoor - | Is this one from Microsoft?: Another vulnerability has been found that can bypass Microsoft's BitLocker encryption ...
winfuture.de/news,158701.html
A new Windows 11 BitLocker bypass only needs a USB stick, and the researcher thinks it's a backdoor
xda-developers.com/new-windows-11-bitlocker-bypass-needs-usb-stick-researcher-backdoor/
Key FactsUSB-Based Backdoor Breaches BitLocker Encryption
May 14, 2026 · Reading time: ~45 sec.
Summary created with AI assistance · Source: tomshardware.com
Summary created with AI assistance · Source: tomshardware.com
- The YellowKey zero-day exploit allows complete access to BitLocker-encrypted drives by copying files to a USB stick and rebooting into recovery mode.
- The exploit’s files vanish from the USB after use, suggesting a concealed backdoor that raises serious security and political concerns.
- YellowKey affects Windows Server 2022 and 2025 but not Windows 10, and it can bypass TPM-and-PIN configurations.
- Another exploit, GreenPlasma, enables local privilege escalation to system-level access, posing significant risks especially to server systems.
could have made some insane cash selling this, but no amount of money will stand between me and my determination against Microsoft.— Chaotic Eclipse (Nightmare-Eclipse) – regarding the YellowKey zero-day exploit and their stance against Microsoft.
A security researcher says Microsoft secretly built a backdoor into BitLocker, releases an exploit to prove it
techspot.com/news/112410-security-researcher-microsoft-secretly-built-backdoor-bitlocker-releases.html
Windows BitLocker zero-day gives access to protected drives, PoC released: A cybersecurity researcher has published proof-of-concept (PoC) exploits for two ...
bleepingcomputer.com/news/security/windows-bitlocker-zero-day-gives-access-to-protected-drives-poc-released/
After a row with Microsoft: Researcher leaks zero-day exploit for BitLocker - | Golem.de
golem.de/news/nach-zoff-mit-microsoft-forscher-leakt-zero-day-exploit-fuer-bitlocker-2605-208630.html
WindowsCentral Apr 16
"Microsoft fired the skilled people, leaving flowchart followers": Microsoft's Security Response Center is being blamed for the zero-day ...
windowscentral.com/microsoft/microsoft-security-response-center-bluehammer-exploit
Windows 11 users reportedly losing data due to Microsoft's forced BitLocker encryption
neowin.net/news/windows-11-users-reportedly-losing-data-due-to-microsofts-forced-bitlocker-encryption/
Windows 11 24H2 will enable BitLocker encryption for everyone — happens on both clean installs and reinstalls
tomshardware.com/software/windows/windows-11-24h2-will-enable-bitlocker-encryption-for-everyone-happens-on-both-clean-installs-and-reinstalls
Key FactsReport: BitLocker may reach Windows 11 24H2 Home
May 6, 2024 · Reading time: ~45 sec.
Summary created with AI assistance · Source: neowin.net
Summary created with AI assistance · Source: neowin.net
- German news outlet Deskmodder reports that Windows 11 24H2 may activate BitLocker by default during installation, including on the Home edition.
- The observation was made with the redesigned Setup, while Settings under Privacy & security provides an option to disable Device Encryption.
- According to the article, default software-based BitLocker encryption using XTS-AES 128 caused significant performance losses even on some fast PCIe Gen4 NVMe SSDs.
- If the recovery key is lost or not saved correctly, recovering encrypted data may be difficult or potentially impossible, the article states.
And worse, an unsuspecting user could completely miss the fact that their device is encrypted and recovery of the encrypted data can prove problematic or potentially impossible in case the key is misplaced, or not saved properly.— Deskmodder; from their report on Windows 11 24H2 enabling BitLocker by default
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