Zero-Day Exploit YellowKey Bypasses Windows 11 BitLocker Encryption

A zero-day exploit named YellowKey, published earlier this week by a researcher using the alias Nightmare-Eclipse, reliably bypasses default Windows 11 BitLocker encryption protections. The exploit requires physical access to the target computer to compromise full-volume encryption, which is designed to secure disk contents using a decryption key stored in a Trusted Platform Module (TPM). BitLocker is a mandatory security measure for many organizations, including government contractors. The exploit was detailed in a GitHub repository and referenced in security reporting by Ars Technica. No CVE ID or specific patch timeline was mentioned in the article.