Local code execution via direct registry query
Published Jan 14, 2026 · Updated Jan 14, 2026
Out-of-bounds write in InsydeH2O Tools allows local users to corrupt memory through a crafted registry value read by H2OFFT64.sys. H2OFFT64.sys uses RTL_QUERY_REGISTRY_DIRECT when reading an attacker-influenced registry value, causing the registry query to write beyond its destination buffer. A low-privileged user-mode application is required; successful exploitation executes code in the driver's privileged context and compromises the host.
Summary
What happened
Out-of-bounds write in InsydeH2O Tools allows local users to corrupt memory through a crafted registry value read by H2OFFT64.sys. H2OFFT64.sys uses RTL_QUERY_REGISTRY_DIRECT when reading an attacker-influenced registry value, causing the registry query to write beyond its destination buffer. A low-privileged user-mode application is required; successful exploitation executes code in the driver's privileged context and compromises the host.
The record
- CVE
- CVE-2025-12051
- Published
- Jan 14, 2026
- Updated
- Jan 14, 2026
- Vendor
- Insyde Software
- Product
- InsydeH2O Tools
- Classifications
- CWE-787, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 14, 2026CVE publishedPublication date reported by the CVE source.
- Jan 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=See in the Solution
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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