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CVE-2025-12052— egwindrv.sys is potentially vulnerable to a buffer overflow.

Quick assessment

Affected
Insyde Software InsydeH2O tools
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Insyde InsydeH2O是中国系微（Insyde）公司的一个新的 EFI/UEFI 规范。旨在取代传统的 BIOS（基本输入/输出系统）。 Insyde InsydeH2O存在安全漏洞，该漏洞源于使用RTL_QUERY_REGISTRY_DIRECT标志读取注册表值时，不可信的用户模式应用程序可能导致缓冲区溢出。

CVSS 7.8 · High EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1213 · Data from Information Repositories
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I. Basic Information for CVE-2025-12052

Vulnerability Information
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Vulnerability Title
egwindrv.sys is potentially vulnerable to a buffer overflow.
Source: CVE Program / CVE List V5
Vulnerability Description
The drivers in the tool packages use RTL_QUERY_REGISTRY_DIRECT flag to read a registry value to which an untrusted user-mode application may be able to cause a buffer overflow.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Insyde InsydeH2O 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Insyde InsydeH2O是中国系微（Insyde）公司的一个新的 EFI/UEFI 规范。旨在取代传统的 BIOS（基本输入/输出系统）。 Insyde InsydeH2O存在安全漏洞，该漏洞源于使用RTL_QUERY_REGISTRY_DIRECT标志读取注册表值时，不可信的用户模式应用程序可能导致缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Insyde Software InsydeH2O tools See in the Solution -

II. Public POCs for CVE-2025-12052

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III. Intelligence Information for CVE-2025-12052

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Vendor Advisories for CVE-2025-12052 (1)

Same Patch Batch · Insyde Software · 2026-01-14 · 4 CVEs total

CVE-2025-12050 7.8 HIGH In H2OFFT32.sys is potentially vulnerable to a buffer overflow.
CVE-2025-12051 7.8 HIGH H2OFFT64.sys is potentially vulnerable to a buffer overflow.
CVE-2025-12053 7.8 HIGH egwindrvx64.sys is potentially vulnerable to a buffer overflow

IV. Related Vulnerabilities

Same product: InsydeH2O tools
Same vendor: Insyde Software
Same weakness: CWE-787

V. Comments for CVE-2025-12052

Anonymous User
2026-01-15 06:08:34

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