CVE-2025-12052

Local code execution via registry value overflow

Published Jan 14, 2026 · Updated Jan 14, 2026

Out-of-bounds write in the egwindrv.sys driver in InsydeH2O Tools allows local users to execute code via a crafted registry value. The driver's RTL_QUERY_REGISTRY_DIRECT query reads an attacker-influenced registry value directly into its supplied buffer, allowing the value to overrun that destination. Exploitation requires low-privileged local access and no user interaction; successful memory corruption permits arbitrary code execution or a host crash.

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

What happened

Out-of-bounds write in the egwindrv.sys driver in InsydeH2O Tools allows local users to execute code via a crafted registry value. The driver's RTL_QUERY_REGISTRY_DIRECT query reads an attacker-influenced registry value directly into its supplied buffer, allowing the value to overrun that destination. Exploitation requires low-privileged local access and no user interaction; successful memory corruption permits arbitrary code execution or a host crash.

The record

CVE
CVE-2025-12052
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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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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