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CVE-2024-23593 affects a system recovery bootloader included with Lenovo-preloaded Windows 7 and Windows 8 operating systems from 2012 through 2014. A privileged attacker with local access can modify the boot manager and escalate privileges. The vulnerability involves zeroing out the boot manager and dropping into a UEFI shell, and is characterized as a boot security feature bypass. The precise underlying implementation flaw is not established.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability associated with LenovoBT.efi discussed in the context of missing Secure Boot revocations. Divergent lists and incomplete binary updates undermined protection; the article reports that Microsoft, UEFI Forum, and LVFS lists matched by January 21, 2025.
Lenovo boot-process issue that can zero out Boot Manager and drop the system to UEFI Shell; described as a security feature bypass advisory item in this release context.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.