Cyber Resilience

CVE-2021-3971

Medium

Published: 22 April 2022

Published
22 April 2022
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0080 74.5th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-3971 is a medium-severity Active Debug Code (CWE-489) vulnerability in Lenovo Ideapad 3-14Ada05 Firmware. Its CVSS base score is 6.7 (Medium).

Operationally, ranked in the top 25.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

NVRAM variable.

CWE(s)
CWE-489NVD-CWE-Other

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

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 3-15ada6 firmware
≤ hbcn21ww
lenovo
ideapad 3-15alc6 firmware
≤ glcn43ww
lenovo
ideapad 3-15are05 firmware
≤ dzcn42ww
lenovo
ideapad 3-15igl05 firmware
≤ dvcn23ww
lenovo
ideapad 3-17ada05 firmware
≤ e8cn33ww
lenovo
ideapad 3-17ada6 firmware
≤ hbcn21ww
+63 more product configuration(s) — see NVD for full list

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-25 Thin Nodes
addresses: CWE-489

Minimal functionality precludes inclusion of active debug code or diagnostic interfaces.

References