CVE-2026-0421 PUBLISHED

Assigner: lenovo
Reserved: 04.12.2025 Published: 14.01.2026 Updated: 26.02.2026

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.

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	High
User Interaction	Passive

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
CVSS Score: 6.5

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	High
User Interaction	Required	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Lenovo
Product	ThinkPad L13 Gen 6 BIOS
Versions	Default: unaffected affected from 0 to 1.10 (excl.)

Vendor	Lenovo
Product	ThinkPad L13 Gen 6 2 in 1 BIOS
Versions	Default: unaffected affected from 0 to 1.10 (excl.)

Vendor	Lenovo
Product	ThinkPad L14 Gen 6 BIOS
Versions	Default: unaffected affected from 0 to 1.06 (excl.)

Vendor	Lenovo
Product	ThinkPad L16 Gen 2 BIOS
Versions	Default: unaffected affected from 0 to 1.06 (excl.)

Solutions

Update to the version (or higher) as recommended in the Product Impact section in the advisory: https://support.lenovo.com/us/en/product_security/LEN-210688

References

https://support.lenovo.com/us/en/product_security/LEN-210688

Problem Types

CWE-252: Unchecked Return Value CWE