How severe is CVE-2023-28402?

CVE-2023-28402 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2023-28402 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-28402?

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-2023-28402 have an EU (EUVD) identifier?

Yes. CVE-2023-28402 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-32098.

When was CVE-2023-28402 published?

CVE-2023-28402 was published on 2024-05-16 and last updated on 2026-06-17.

CVE-2023-28402

CVE-2023-28402 is a high-severity vulnerability with a CVSS 3.x base score of 7.2. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-32098
Weakness: CWE-20
Published: 2024-05-16
Last modified: 2026-06-17

Description

Improper input validation in some Intel(R) BIOS Guard firmware may allow a privileged user to potentially enable escalation of privilege via local access.

Frequently asked questions

What is CVE-2023-28402?: Improper input validation in some Intel(R) BIOS Guard firmware may allow a privileged user to potentially enable escalation of privilege via local access.
How severe is CVE-2023-28402?: CVE-2023-28402 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2023-28402 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-28402?: 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-2023-28402 have an EU (EUVD) identifier?: Yes. CVE-2023-28402 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-32098.
When was CVE-2023-28402 published?: CVE-2023-28402 was published on 2024-05-16 and last updated on 2026-06-17.

References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00814.html

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