CVE-2025-4276— UsbCoreDxe: improper input validation may lead to arbitrary code execution
Quick assessment
Affected
Insyde Software InsydeH2O
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，该漏洞源于可写入SMRAM任意内存并在SMM级别执行任意代码。
Possible ATT&CK Techniques 2 AI
T1055 · Process Injection T1621 · Multi-Factor Authentication Request Generation
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I. Basic Information for CVE-2025-4276
Vulnerability Information
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Vulnerability Title
UsbCoreDxe: improper input validation may lead to arbitrary code execution
Source: CVE Program / CVE List V5
Vulnerability Description
UsbCoreDxe has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
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，该漏洞源于可写入SMRAM任意内存并在SMM级别执行任意代码。
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 | Kernel 5.3 ~ 05.39.18 | - |
|
II. Public POCs for CVE-2025-4276
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Insyde Software · 2025-08-13 · 3 CVEs total
| CVE-2025-4277 | 7.5 HIGH | Tcg2Smm: improper input validation may lead to arbitrary code execution |
| CVE-2025-4410 | 7.5 HIGH | SetupUtility: A buffer overflow vulnerability leads to arbitrary code execution. |
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V. Comments for CVE-2025-4276
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