Arbitrary Memory Write Vulnerability in Insyde Software’s UsbCoreDxe Product
CVE-2025-4276

7.5HIGH

Key Information:

Vendor

Insyde Software

Status
Insydeh2o
Vendor
CVE Published:
13 August 2025

What is CVE-2025-4276?

The UsbCoreDxe component within Insyde Software has a vulnerability that enables attackers to write arbitrary memory in System Management RAM (SMRAM). This flaw could lead to the execution of malicious code at the System Management Mode (SMM) level, potentially allowing unauthorized operations or compromise of the system.

Affected Version(s)

InsydeH2O Kernel 5.3 < 05.39.18

InsydeH2O Kernel 5.5 < 05.55.18

InsydeH2O Kernel 5.6 < 05.62.18

References

https://www.insyde.com/security-pledge/sa-2025005/

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2025-4276 : Arbitrary Memory Write Vulnerability in Insyde Software’s UsbCoreDxe Product