New Horizon Data Systems Boot Loader Bypass
A Secure Boot bypass vulnerability exists in New Horizon Datasys bootloaders released before 2022-06-01. The affected bootloader is signed and therefore trusted by UEFI Secure Boot, but it is inherently vulnerable in a way that allows an attacker to replace the legitimate signed bootloader with the New Horizon bootloader and then load and execute arbitrary code during the pre-boot phase. Because the vulnerable bootloader remains accepted by Secure Boot, it can be used to tamper with or bypass Secure Boot protections despite signature validation succeeding. The issue is part of the set of third-party UEFI bootloader bypasses addressed by Microsoft through Secure Boot DBX revocation updates, including KB5012170.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Secure Boot-related boot loader bypass vulnerability involving the New Horizon Data Systems Inc boot loader, addressed via Secure Boot DBX updates.
A vulnerability in third-party UEFI bootloaders signed by Microsoft allows attackers to bypass Secure Boot, undermining the boot process security.
The version that knows your environment.
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.