CVE-2021-3971

mediumpriority · track · 27OT risk · elevatedEPSS 0.012 · 69 %ileEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.24% (69th) EPSS
CVSS 4.6 · medium
Is it mine?
149 products
Check your exposure
Who says so?
3 sources
cnnvd · enisa_euvd · fstec_bdu

EPSS · scored 2026-10-27

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.

01

cvss

Technical severity, 0–10. One row per scoring source.

6.7
010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.6mediumAV:L/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 3.9 · impact 6.4
v3.16.7mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 0.8 · impact 5.9
v3.16.7mediumAV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.16.7mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU
v3.16.7mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · psirt@lenovo.comexploitability 0.8 · impact 5.9
v3.16.1mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-264USCWE-489US
03

affected products (149)

Products and version ranges known to be affected.

showing 20 of 149
04

also known as (5)

Other names and identifiers for this entity.

05

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bduNVDCVE.orgMITRE
published 2022-04-22modified 2026-06-17
06

references (7)

External citations — patches, advisories, analysis.

scry

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