CVE-2025-12053

Kernel memory corruption via unsafe registry read

Published Jan 14, 2026 · Updated Jan 14, 2026

Out-of-bounds write in egwindrvx64.sys in InsydeH2O Tools allows local users to corrupt driver memory via a registry value. The driver uses RTL_QUERY_REGISTRY_DIRECT to place an attacker-influenced registry value directly into a destination buffer without a safe size boundary. A local low-privileged user-mode process must control the registry value; Insyde does not publish the specific post-corruption outcome.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in egwindrvx64.sys in InsydeH2O Tools allows local users to corrupt driver memory via a registry value. The driver uses RTL_QUERY_REGISTRY_DIRECT to place an attacker-influenced registry value directly into a destination buffer without a safe size boundary. A local low-privileged user-mode process must control the registry value; Insyde does not publish the specific post-corruption outcome.

The record

CVE
CVE-2025-12053
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

  1. Jan 14, 2026CVE publishedPublication date reported by the CVE source.
  2. 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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  1. Affected versionversion=See in the Solution

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Insyde Software · InsydeH2O Toolsversion=See in the Solution

Published CVSS scores

7.8Insyde SoftwareCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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