{"id":237523,"date":"2026-05-21T02:16:18","date_gmt":"2026-05-21T07:16:18","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/05\/microsoft-shares-mitigation-for-yellowkey-windows-zero-day"},"modified":"2026-05-21T02:16:18","modified_gmt":"2026-05-21T07:16:18","slug":"microsoft-shares-mitigation-for-yellowkey-windows-zero-day","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/05\/microsoft-shares-mitigation-for-yellowkey-windows-zero-day","title":{"rendered":"Microsoft shares mitigation for YellowKey Windows zero-day"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/microsoft-shares-mitigation-for-yellowkey-windows-zero-day2.jpg\"><\/a><\/p>\n<p>Microsoft has shared mitigations for YellowKey, a recently disclosed Windows BitLocker zero-day vulnerability that grants access to protected drives.<\/p>\n<p>The security flaw <a href=\"https:\/\/www.bleepingcomputer.com\/news\/security\/windows-bitlocker-zero-day-gives-access-to-protected-drives-poc-released\/\" target=\"_blank\" rel=\"nofollow noopener\">was disclosed last week<\/a> by an anonymous security researcher known as \u2018Nightmare Eclipse,\u2019 who described it as a backdoor and published a proof-of-concept (PoC) exploit.<\/p>\n<p>Nightmare Eclipse said that exploiting this zero-day involves placing specially crafted \u2018FsTx\u2019 files on a USB drive or EFI partition, rebooting into WinRE, and then triggering a shell with unrestricted access to the BitLocker-protected storage volume by holding down the CTRL key.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft has shared mitigations for YellowKey, a recently disclosed Windows BitLocker zero-day vulnerability that grants access to protected drives. The security flaw was disclosed last week by an anonymous security researcher known as \u2018Nightmare Eclipse,\u2019 who described it as a backdoor and published a proof-of-concept (PoC) exploit. Nightmare Eclipse said that exploiting this zero-day involves [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1492],"tags":[],"class_list":["post-237523","post","type-post","status-publish","format-standard","hentry","category-security"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/237523","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=237523"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/237523\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=237523"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=237523"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=237523"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}