CVE-2021-3971

MEDIUM

6.7

CVSS Score

Published: April 22, 2022 at 08:30 PM UTC

Updated: June 17, 2026 at 04:06 AM UTC

147 products affected across 1 vendorIdeapad Gaming 3-15imh05 FirmwareLegion 5-15ith6 FirmwareLegion 5-15ith6h Firmware

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Severity

MEDIUM6.7

Exploit prediction

EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ideapad 3-14ada05 Firmware · Lenovo

95%

v < e8cn33ww

Affected range stops below e8cn33ww, so it looks safe — our inference, not a vendor statement

lenovo-ideapad-3-14ada05 (same device)

Ideapad 3-14ada6 Firmware · Lenovo

95%

v < hbcn21ww

Affected range stops below hbcn21ww, so it looks safe — our inference, not a vendor statement

lenovo-ideapad-3-14ada6 (same device)

Ideapad 3-14alc6 Firmware · Lenovo

95%

v < glcn43ww

Affected range stops below glcn43ww, so it looks safe — our inference, not a vendor statement

lenovo-ideapad-3-14alc6 (same device)

Ideapad 3-14are05 Firmware · Lenovo

95%

v < dzcn42ww

Affected range stops below dzcn42ww, so it looks safe — our inference, not a vendor statement

lenovo-ideapad-3-14are05 (same device)

Ideapad 3-14igl05 Firmware · Lenovo

95%

v < emcn52ww

Affected range stops below emcn52ww, so it looks safe — our inference, not a vendor statement

lenovo-ideapad-3-14igl05 (same device)

Ideapad 3-14iil05 Firmware · Lenovo

95%

v < dvcn23ww

Affected range stops below dvcn23ww, so it looks safe — our inference, not a vendor statement

lenovo-ideapad-3-14iil05 (same device)

Ideapad 3-15ada05 Firmware · Lenovo

95%

v < e8cn33ww

Affected range stops below e8cn33ww, so it looks safe — our inference, not a vendor statement

lenovo-ideapad-3-15ada05 (same device)

Ideapad 3-15ada6 Firmware · Lenovo

95%

v < hbcn21ww

Affected range stops below hbcn21ww, so it looks safe — our inference, not a vendor statement

lenovo-ideapad-3-15ada6 (same device)

Ideapad 3-15alc6 Firmware · Lenovo

95%

v < glcn43ww

Affected range stops below glcn43ww, so it looks safe — our inference, not a vendor statement

lenovo-ideapad-3-15alc6 (same device)

Ideapad 3-15are05 Firmware · Lenovo

95%

v < dzcn42ww

Affected range stops below dzcn42ww, so it looks safe — our inference, not a vendor statement

lenovo-ideapad-3-15are05 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://support.lenovo.com/us/en/product_security/LEN-73440

References (1)

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.lenovo.com/us/en/product_security/LEN-73440

CVSS

6.7MEDIUMlenovo

Attack Vector: LOCAL
Complexity: LOW
Privileges: HIGH
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-489NVD-CWE-Other

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