{"uuid": "5a78a97f-3446-4fd5-a943-68a41eb2b741", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-45585", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityExploit/32517", "content": "\u26a0\ufe0f CVE / ZERO-DAY\n\ud83d\udd25 YellowKey \u2013 BitLocker Bypass Vulnerability (WinRE Abuse / USB Unlock Method)\nPublic GitHub release + widespread security community verification\n\n\ud83c\udfaf Target\nMicrosoft Windows 11 / Windows Server 2022 / 2025\n(BitLocker + Windows Recovery Environment)\n\n\ud83d\udd17 GitHub Repository\n\u27a1\ufe0fhttps://github.com/Nightmare-Eclipse/YellowKey\n\n\ud83d\udd17 Technical Analysis / References\n\u27a1\ufe0fhttps://eclypsium.com/blog/yellowkey-bitlocker-bypass-windows-recovery-environment/\n\u27a1\ufe0fhttps://arstechnica.com/security/2026/05/zero-day-exploit-completely-defeats-default-windows-11-bitlocker-protections/\n\u27a1\ufe0fhttps://www.techspot.com/news/112410-security-researcher-microsoft-secretly-built-backdoor-bitlocker-releases.html\n\n\ud83e\udde0 Overview\nA researcher known as Nightmare-Eclipse / Chaotic Eclipse publicly released YellowKey, a BitLocker bypass affecting modern Windows systems. The attack abuses behavior inside the Windows Recovery Environment (WinRE) to gain unrestricted access to BitLocker-protected drives using specially crafted filesystem transaction logs (FsTx).\nThe exploit requires only:\n\u2022 Physical access\n\u2022 A prepared USB device\n\u2022 Reboot into WinRE\nSecurity researchers and independent testers confirmed the exploit works on vulnerable systems.\n\n\u2699\ufe0f Attack Flow\n\u2022 Copy FsTx folder into:\nSystem Volume Information\\FsTx\n\u2022 Boot target into WinRE\n\u2022 Hold CTRL during reboot sequence\n\u2022 WinRE replays malicious NTFS transaction logs\n\u2022 Recovery shell launches with unlocked BitLocker volume access\nAccording to analysis, the exploit deletes winpeshl.ini, causing WinRE to fall back to cmd.exe execution.\n\n\ud83d\udca5 Impact\n\u2022 BitLocker protection bypass\n\u2022 Full filesystem access\n\u2022 Physical attacker compromise\n\u2022 Credential / crypto wallet theft risk\n\u2022 Enterprise laptop exposure\n\n\ud83e\uddea Technical Insight\nResearchers noted that the vulnerability abuses a trusted recovery workflow already capable of accessing decrypted volumes. The issue appears tied to WinRE transaction log replay behavior involving the FsTx directory.\nCommunity discussion suggests:\n\u2022 TPM-only protection is vulnerable\n\u2022 Some TPM+PIN configurations may still be affected\n\u2022 Minimal traces may remain after execution\n\n\ud83d\udcda Research Value\n\u2022 BitLocker bypass methodology\n\u2022 WinRE abuse techniques\n\u2022 Physical attack surface analysis\n\u2022 Filesystem transaction log exploitation\n\u2022 Recovery environment trust-boundary research\n\n\u26a0\ufe0f Intelligence Note\nCurrent trend:\n\u2022 WinRE becoming a high-value attack surface\n\u2022 Public zero-day releases increasing\n\u2022 Physical-access attacks regaining relevance\n\u2022 Security researchers increasingly publishing full PoCs directly to GitHub\nMicrosoft is reportedly investigating the issue, with discussions referencing mitigation tracking under CVE-2026-45585.\n\n\ud83e\udde0 Cyber Security Exploit Research Community\nMalware Analysis | Reverse Engineering | CVE Research | Threat Intelligence\n\n\u2796\u2796\u2796\u2796\u2796\u2796\u2796\u2796\u2796\u2796\n\n\ud83d\udd10 Cyber Security Exploit Community\nTelegram Group\nhttps://t.me/Cyber_Security_Exploit\n\nTelegram Channel\nhttps://t.me/CyberSecurityExploit\n\nResearch \u2022 Ethical Hacking \u2022 Red Team", "creation_timestamp": "2026-08-15T15:00:04.587609Z"}