What is CVE-2020-8334?

CVE-2020-8334 is a medium-severity vulnerability in Lenovo Bios, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 6.1/10. Published 2020-06-09.

How severe is CVE-2020-8334?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Lenovo Bios

CVE-2020-8334

The BIOS tamper detection mechanism was not triggered in Lenovo ThinkPad T495s, X395, T495, A485, A285, A475, A275 which may allow for unauthorized access.

Published 2020-06-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (25.8th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

support.lenovo.com/us/en/product_security/LEN-30042 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-8334?: CVE-2020-8334 is a medium-severity vulnerability in Lenovo Bios, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 6.1/10. Published 2020-06-09.
How severe is CVE-2020-8334?: Medium severity. CVSS v3 base score is 6.1 out of 10.