Arbitrary Memory Write Vulnerability in Tcg2Smm from Insyde Software
CVE-2025-4277

7.5HIGH

Key Information:

Vendor

Insyde Software

Status
Insydeh2o
Vendor
CVE Published:
13 August 2025

What is CVE-2025-4277?

Tcg2Smm contains a vulnerability that could allow unauthorized access to write arbitrary data within System Management RAM (SMRAM). This exposure can be exploited to execute arbitrary code at the System Management Mode (SMM) level, potentially compromising system integrity and security. Appropriate measures should be taken to mitigate this risk.

Affected Version(s)

InsydeH2O Kernel 5.2 < 05.2A.21

InsydeH2O Kernel 5.4 < 05.47.21

InsydeH2O Kernel 5.5 < 05.55.21

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

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CVE-2025-4277 : Arbitrary Memory Write Vulnerability in Tcg2Smm from Insyde Software