CVE-2023-20518

Description

Incomplete cleanup in the ASP may expose the Master Encryption Key (MEK) to a privileged attacker with access to the BIOS menu or UEFI shell and a memory exfiltration vulnerability, potentially resulting in loss of confidentiality.

CVSS v3.1 Score

1.9

LOW

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-459 CWE-459

References

Other References

https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html https://www.amd.com/en/resources/product-security/bulletin/amd-sb-5002.html

Frequently Asked Questions

What is CVE-2023-20518? +

Incomplete cleanup in the ASP may expose the Master Encryption Key (MEK) to a privileged attacker with access to the BIOS menu or UEFI shell and a memory exfiltration vulnerability, potentially resulting in loss of confidentiality. It has a CVSS v3.1 base score of 1.9 (LOW).

How severe is CVE-2023-20518? +

CVE-2023-20518 has a CVSS v3.1 score of 1.9 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

How do I check if I'm vulnerable to CVE-2023-20518? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-6338

There is an incomplete cleanup vulnerability in Qt Network's Schannel support on Windows which can lead to a Denial of …

CVE-2026-0427

Improper cleanup of shared register resources in GPU firmware could allow an admin-privileged attacker from a Guest Virtual machine (VM) …

CVE-2026-34263 9.6

Due to improper Spring Security configuration, SAP Commerce Cloud allows an unauthenticated user to perform malicious input injection, resulting in …

CVE-2024-28265 9.1

IBOS v4.5.5 has an arbitrary file deletion vulnerability via \system\modules\dashboard\controllers\LoginController.php.

CVE-2025-21609 9.1

SiYuan is self-hosted, open source personal knowledge management software. SiYuan Note version 3.1.18 has an arbitrary file deletion vulnerability. The …

CVE-2025-66675 8.2

Denial of Service vulnerability in Apache Struts, file leak in multipart request processing causes disk exhaustion. This issue affects Apache …