CVE-2021-3972

MEDIUM

Lenovo Notebook BIOS - Privilege Escalation

Title source: llm
STIX 2.1

Description

A potential vulnerability by a driver used during manufacturing process on some consumer Lenovo Notebook devices' BIOS that was mistakenly not deactivated may allow an attacker with elevated privileges to modify secure boot setting by modifying an NVRAM variable.

Exploits (1)

nomisec WORKING POC 4 stars
by killvxk · poc
https://github.com/killvxk/CVE-2021-3972

Scores

CVSS v3 6.7
EPSS 0.0321
EPSS Percentile 87.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-489
Status published
Products (50)
lenovo/ideapad_3-14ada05_firmware < e8cn33ww
lenovo/ideapad_3-14ada6_firmware < hbcn21ww
lenovo/ideapad_3-14alc6_firmware < glcn43ww
lenovo/ideapad_3-14are05_firmware < dzcn42ww
lenovo/ideapad_3-14igl05_firmware < emcn52ww
lenovo/ideapad_3-14iil05_firmware < dvcn23ww
lenovo/ideapad_3-14iml05_firmware < dxcn41ww
lenovo/ideapad_3-14itl05_firmware < gccn26ww
lenovo/ideapad_3-14itl6_firmware < ggcn33ww
lenovo/ideapad_3-15ada05_firmware < e8cn33ww
... and 40 more
Published Apr 22, 2022
Tracked Since Feb 18, 2026