How severe is CVE-2023-20587?

CVE-2023-20587 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2023-20587 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-20587?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-20587 have an EU (EUVD) identifier?

Yes. CVE-2023-20587 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-24766.

When was CVE-2023-20587 published?

CVE-2023-20587 was published on 2024-02-13 and last updated on 2026-06-17.

CVE-2023-20587

CVE-2023-20587 is a high-severity vulnerability with a CVSS 3.x base score of 7.1. 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-284.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-24766
Weakness: CWE-284
Published: 2024-02-13
Last modified: 2026-06-17

Description

Improper Access Control in System Management Mode (SMM) may allow an attacker access to the SPI flash potentially leading to arbitrary code execution.

Frequently asked questions

What is CVE-2023-20587?: Improper Access Control in System Management Mode (SMM) may allow an attacker access to the SPI flash potentially leading to arbitrary code execution.
How severe is CVE-2023-20587?: CVE-2023-20587 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2023-20587 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-20587?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-20587 have an EU (EUVD) identifier?: Yes. CVE-2023-20587 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-24766.
When was CVE-2023-20587 published?: CVE-2023-20587 was published on 2024-02-13 and last updated on 2026-06-17.

References

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7009

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