How severe is CVE-2023-40220?

CVE-2023-40220 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-2023-40220 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.

What products are affected by CVE-2023-40220?

CVE-2023-40220 primarily affects Intel Nuc6cayh Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-40220?

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

When was CVE-2023-40220 published?

CVE-2023-40220 was published on 2023-11-14 and last updated on 2026-06-17.

CVE-2023-40220

CVE-2023-40220 is a medium-severity vulnerability in Intel Nuc6cayh Firmware 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-92.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-92
Affected product: Intel Nuc6cayh Firmware
Published: 2023-11-14
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2023-40220?: Improper buffer restrictions in some Intel(R) NUC BIOS firmware may allow a privileged user to potentially enable information disclosure via local access.
How severe is CVE-2023-40220?: CVE-2023-40220 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-2023-40220 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.
What products are affected by CVE-2023-40220?: CVE-2023-40220 primarily affects Intel Nuc6cayh Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-40220?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-40220 published?: CVE-2023-40220 was published on 2023-11-14 and last updated on 2026-06-17.

References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01001.html

Affected products (2)

cpe:2.3:o:intel:nuc6cayh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc6cays_firmware:*:*:*:*:*:*:*:*

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