What is CVE-2020-8740?

CVE-2020-8740 is a medium-severity vulnerability in Intel Bios, classified under Out-of-bounds Write. CVSS score: 6.7/10. Published 2020-11-12.

How severe is CVE-2020-8740?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Buffer overflow in Intel Bios

CVE-2020-8740

Out of bounds write in Intel BIOS platform sample code for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

Vulnerability class: Buffer Overflow

Published 2020-11-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.1th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00390 (Vendor Advisory)
security.netapp.com/advisory/ntap-20210122-0008/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-8740?: CVE-2020-8740 is a medium-severity vulnerability in Intel Bios, classified under Out-of-bounds Write. CVSS score: 6.7/10. Published 2020-11-12.
How severe is CVE-2020-8740?: Medium severity. CVSS v3 base score is 6.7 out of 10.