How BlackLotus UEFI Bootkit Bypasses Secure Boot and Microsoft’s Patch Roadmap

The BlackLotus UEFI bootkit (CVE‑2023‑24932) can evade Windows Secure Boot by exploiting legacy certificates, prompting Microsoft to roll out a five‑phase patch series starting May 2023, refresh UEFI firmware, blacklist old boot managers, and introduce visual status indicators as the 2011 certificates expire in 2026.

BootkitCVE-2023-24932Microsoft Patch

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How BlackLotus UEFI Bootkit Bypasses Secure Boot and Microsoft’s Patch Roadmap

IT Services Circle

Sep 23, 2025 · Information Security

How Microsoft’s 5‑Phase Secure Boot Update Tackles the BlackLotus UEFI Bootkit

Microsoft’s multi‑stage mitigation plan for the BlackLotus UEFI bootkit details five phases—from initial KB5025885 deployment to final forced enforcement—aimed at revoking vulnerable certificates, updating boot managers, and ensuring systems stay secure through automatic updates and manual activation steps.

BootkitCertificate RevocationMicrosoft

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How Microsoft’s 5‑Phase Secure Boot Update Tackles the BlackLotus UEFI Bootkit

IT Services Circle

Jul 13, 2023 · Information Security

Manual Mitigation Steps for BlackLotus UEFI Bootkit (CVE‑2023‑24932) and Microsoft’s Three‑Phase Update Strategy

This article explains the BlackLotus UEFI bootkit (CVE‑2023‑24932), outlines Microsoft's three‑phase remediation strategy, details the KB5025885 and KB5028166/KB5028185 updates, provides a simplified registry command for manual activation, and warns of compatibility issues for legacy boot managers.

BootkitCVE-2023-24932Secure Boot

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Manual Mitigation Steps for BlackLotus UEFI Bootkit (CVE‑2023‑24932) and Microsoft’s Three‑Phase Update Strategy