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CVE-2026-0421

Quick assessment

Affected
Lenovo ThinkPad L13 Gen 6 BIOS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Lenovo ThinkPad BIOS是中国联想（Lenovo）公司的一款笔记本启动系统的程序。 Lenovo ThinkPad BIOS存在安全漏洞，该漏洞源于BIOS中安全启动配置验证不当，可能导致安全启动被禁用。

CVSS 6.5 · Medium EPSS 0.16% · P4

Possible ATT&CK Techniques 1 AI

T1562.008
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I. Basic Information for CVE-2026-0421

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加检查的返回值
Source: CVE Program / CVE List V5
Vulnerability Title
Lenovo ThinkPad BIOS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Lenovo ThinkPad BIOS是中国联想（Lenovo）公司的一款笔记本启动系统的程序。 Lenovo ThinkPad BIOS存在安全漏洞，该漏洞源于BIOS中安全启动配置验证不当，可能导致安全启动被禁用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Lenovo ThinkPad L13 Gen 6 BIOS 0 ~ 1.10 -
Lenovo ThinkPad L13 Gen 6 2 in 1 BIOS 0 ~ 1.10 -
Lenovo ThinkPad L14 Gen 6 BIOS 0 ~ 1.06 -
Lenovo ThinkPad L16 Gen 2 BIOS 0 ~ 1.06 -

II. Public POCs for CVE-2026-0421

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III. Intelligence Information for CVE-2026-0421

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Vendor Advisories for CVE-2026-0421 (1)

Same Patch Batch · Lenovo · 2026-01-14 · 6 CVEs total

CVE-2025-13455 7.8 HIGH Lenovo多款产品 安全漏洞
CVE-2025-13454 5.5 MEDIUM Lenovo多款产品 安全漏洞
CVE-2025-13154 5.5 MEDIUM Lenovo Vantage 安全漏洞
CVE-2025-13453 4.6 MEDIUM Lenovo ThinkPlus 安全漏洞
CVE-2025-14058 3.2 LOW Lenovo Tablets 安全漏洞

IV. Related Vulnerabilities

Same vendor: Lenovo
Same weakness: CWE-252

V. Comments for CVE-2026-0421

Anonymous User
2026-01-15 06:08:03

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