Input Validation Flaw in UEFI WheaERST Module for Intel Platforms
CVE-2025-20027

7.1HIGH

Key Information:

Vendor

Intel
Status
Intel(r) Reference Platforms May Allow An Escalation Of Privilege. System Software Adversary With A Privileged User Combined With A High Complexity Attack May Enable Escalation Of Privilege. This Result May Potentially Occur Via Local Access When Attack Requirements Are Present Without Special Internal Knowledge And Requires No User Interaction. The Potential Vulnerability May Impact The Confidentiality (high), Integrity (high) And Availability (high) Of The Vulnerable System, Resulting In Subsequent System Confidentiality (none), Integrity (none) And Availability (none) Impacts.
Vendor
CVE Published:
10 March 2026

What is CVE-2025-20027?

An improper input validation vulnerability exists in the UEFI WheaERST module utilized in certain Intel reference platforms. This flaw could be exploited by a privileged attacker to escalate privileges under specific conditions. The attack may require local access and does not necessitate user interaction, thus making it particularly concerning. If successfully executed, this vulnerability may compromise the confidentiality, integrity, and availability of affected systems, necessitating immediate attention to potential security measures.

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Affected Version(s)

Intel(R) reference platforms may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts. See references

References

https://intel.com/content/www/us/en/security-center/advis...

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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