Is CVE-2021-3971 actively exploited?

No active exploitation of CVE-2021-3971 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-3971 be exploited remotely?

No. CVE-2021-3971 requires local access to exploit.

What is the CVSS score of CVE-2021-3971?

CVE-2021-3971 has a CVSS score of 6.7 (MEDIUM).

HOME VULNERABILITIESCVE-2021-3971

MEDIUM

CVE-2021-3971

CWE-489Published: April 22, 2022· Updated: Jun 17, 2026

6.7

CVSS v3.1

Official Description

A potential vulnerability by a driver used during older manufacturing processes on some consumer Lenovo Notebook devices that was mistakenly included in the BIOS image could allow an attacker with elevated privileges to modify firmware protection region by modifying an NVRAM variable.

NVD Source

Technical Analysis

CVE-2021-3971 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.7.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges Req.High

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Lenovo146 product(s)

ideapad 3-14ada05 firmwareideapad 3-14ada05ideapad 3-14ada6 firmwareideapad 3-14ada6ideapad 3-14alc6 firmwareideapad 3-14alc6ideapad 3-14are05 firmwareideapad 3-14are05ideapad 3-15ada6 firmwareideapad 3-15ada6ideapad 3-15alc6 firmwareideapad 3-15alc6+134

Source: NVD CPE · 146 total CPE entries