What is CVE-2023-40220?

CVE-2023-40220 is a medium-severity vulnerability in Intel Nuc6cayh, classified under CWE-92. CVSS score: 5.3/10. Published 2023-11-14.

How severe is CVE-2023-40220?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Intel Nuc6cayh

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.

Published 2023-11-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (9.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Intel Nuc6cayh
Intel Nuc6cayh Firmware
Intel Nuc6cays
Intel Nuc6cays Firmware
Intel(r) Nuc Bios Firmware — versions See references

Weakness classification (CWE)

CWE-92

References

www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01001.html (Vendor Advisory)

Frequently asked questions

What is CVE-2023-40220?: CVE-2023-40220 is a medium-severity vulnerability in Intel Nuc6cayh, classified under CWE-92. CVSS score: 5.3/10. Published 2023-11-14.
How severe is CVE-2023-40220?: Medium severity. CVSS v3 base score is 5.3 out of 10.