How severe is CVE-2024-21859?

CVE-2024-21859 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2024-21859 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2024-21859?

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

Does CVE-2024-21859 have an EU (EUVD) identifier?

Yes. CVE-2024-21859 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19470.

When was CVE-2024-21859 published?

CVE-2024-21859 was published on 2025-02-12 and last updated on 2026-06-17.

CVE-2024-21859

CVE-2024-21859 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. 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-119.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.8
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19470
Weakness: CWE-119
Published: 2025-02-12
Last modified: 2026-06-17

Description

Improper buffer restrictions in the UEFI firmware for some Intel(R) Processors may allow a privileged user to potentially enable information disclosure via local access.

Frequently asked questions

What is CVE-2024-21859?: Improper buffer restrictions in the UEFI firmware for some Intel(R) Processors may allow a privileged user to potentially enable information disclosure via local access.
How severe is CVE-2024-21859?: CVE-2024-21859 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2024-21859 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2024-21859?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-21859 have an EU (EUVD) identifier?: Yes. CVE-2024-21859 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19470.
When was CVE-2024-21859 published?: CVE-2024-21859 was published on 2025-02-12 and last updated on 2026-06-17.

References

https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01198.html

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