How severe is CVE-2023-20518?

CVE-2023-20518 has a CVSS 3.x base score of 1.9, rated low severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-20518 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-20518?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-20518 have an EU (EUVD) identifier?

Yes. CVE-2023-20518 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-24697.

When was CVE-2023-20518 published?

CVE-2023-20518 was published on 2024-08-13 and last updated on 2026-06-17.

CVE-2023-20518

CVE-2023-20518 is a low-severity vulnerability with a CVSS 3.x base score of 1.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-459.

Key facts

Severity: Low (CVSS 3.x base score 1.9)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-24697
Weakness: CWE-459
Published: 2024-08-13
Last modified: 2026-06-17

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.

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.
How severe is CVE-2023-20518?: CVE-2023-20518 has a CVSS 3.x base score of 1.9, rated low severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-20518 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-20518?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-20518 have an EU (EUVD) identifier?: Yes. CVE-2023-20518 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-24697.
When was CVE-2023-20518 published?: CVE-2023-20518 was published on 2024-08-13 and last updated on 2026-06-17.

References

Other CWE-459 vulnerabilities

CVE-2023-36468 — Critical (CVSS 9.9): XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. When an XWiki…
CVE-2022-45347 — Critical (CVSS 9.8): Apache ShardingSphere-Proxy prior to 5.3.0 when using MySQL as database backend didn't cleanup the database session…
CVE-2021-45330 — Critical (CVSS 9.8): An issue exsits in Gitea through 1.15.7, which could let a malicious user gain privileges due to client side cookies…
CVE-2021-45706 — Critical (CVSS 9.8): An issue was discovered in the zeroize_derive crate before 1.1.1 for Rust. Dropped memory is not zeroed out for an enum.
CVE-2021-32928 — Critical (CVSS 9.8): The Sentinel LDK Run-Time Environment installer (Versions 7.6 and prior) adds a firewall rule named “Sentinel License…
CVE-2020-13451 — Critical (CVSS 9.8): An incomplete-cleanup vulnerability in the Office rendering engine of Gotenberg through 6.2.1 allows an attacker to…

Browse all CWE-459 vulnerabilities →