How severe is CVE-2021-3972?

CVE-2021-3972 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-3972 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3972?

CVE-2021-3972 primarily affects Lenovo Ideapad 3-14ada05 Firmware. In total, 105 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3972?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-3972 published?

CVE-2021-3972 was published on 2022-04-22 and last updated on 2026-06-17.

CVE-2021-3972

CVE-2021-3972 is a medium-severity vulnerability in Lenovo Ideapad 3-14ada05 Firmware with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-489.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v2: 4.6
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-489
Affected product: Lenovo Ideapad 3-14ada05 Firmware
Published: 2022-04-22
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-3972?: 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.
How severe is CVE-2021-3972?: CVE-2021-3972 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-3972 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3972?: CVE-2021-3972 primarily affects Lenovo Ideapad 3-14ada05 Firmware. In total, 105 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3972?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3972 published?: CVE-2021-3972 was published on 2022-04-22 and last updated on 2026-06-17.

References

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

Affected products (105)

cpe:2.3:o:lenovo:ideapad_3-14ada05_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-14ada6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-14alc6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-14are05_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-15ada6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-15alc6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-15are05_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-15igl05_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-17ada05_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-17ada6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-17alc6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-17are05_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-17iil05_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-17itl6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:ideapad_3-15ada05_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:l3_15iml05_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:l3-15itl6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:l340-15irh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:l340-15iwl_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:l340-15iwl_touch_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:l340-17irh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:l340-17iwl_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5_pro-16ach6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5_pro-16ach6h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5_pro-16ith6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5_pro-16ith6h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5-15ach6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5-15ach6a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5-15ach6h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5-15imh6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5-15ith6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5-15ith6h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5-17ach6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5-17ach6h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5-17ith6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_5-17ith6h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_7-16achg6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_7-16ithg6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_s7-15ach6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_y540-15irh_firmware:*:*:*:*:*:*:*:*

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