What is CVE-2026-0421?

CVE-2026-0421 is a medium-severity vulnerability in Lenovo Thinkpad L13 Gen 6 2 In 1 Bios, classified under CWE-252. CVSS score: 6.5/10. Published 2026-01-14.

How severe is CVE-2026-0421?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Lenovo Thinkpad L13 Gen 6 2 In 1 Bios

CVE-2026-0421

A potential vulnerability was reported in the BIOS of L13 Gen 6, L13 Gen 6 2-in-1, L14 Gen 6, and L16 Gen 2 ThinkPads which could result in Secure Boot being disabled even when configured as “On” in the BIOS setup menu. This issue only affects systems where Secure Boot is set to User Mode.

EPSS: 0.001 (1.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.

Affected products

Lenovo Thinkpad L13 Gen 6 2 In 1 Bios — versions 0
Lenovo Thinkpad L13 Gen 6 Bios — versions 0
Lenovo Thinkpad L14 Gen 6 Bios — versions 0
Lenovo Thinkpad L16 Gen 2 Bios — versions 0

Weakness classification (CWE)

CWE-252

References

psirt@lenovo.com

Frequently asked questions

What is CVE-2026-0421?: CVE-2026-0421 is a medium-severity vulnerability in Lenovo Thinkpad L13 Gen 6 2 In 1 Bios, classified under CWE-252. CVSS score: 6.5/10. Published 2026-01-14.
How severe is CVE-2026-0421?: Medium severity. CVSS v3 base score is 6.5 out of 10.