How severe is CVE-2021-3970?

CVE-2021-3970 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-2021-3970 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3970?

CVE-2021-3970 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-2021-3970?

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

When was CVE-2021-3970 published?

CVE-2021-3970 was published on 2022-04-22 and last updated on 2026-06-17.

CVE-2021-3970

CVE-2021-3970 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v2: 7.2
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Lenovo Ideapad 3-14ada05 Firmware
Published: 2022-04-22
Last modified: 2026-06-17

Description

A potential vulnerability in LenovoVariable SMI Handler due to insufficient validation in some Lenovo Notebook models BIOS may allow an attacker with local access and elevated privileges to execute arbitrary code.

Frequently asked questions

What is CVE-2021-3970?: A potential vulnerability in LenovoVariable SMI Handler due to insufficient validation in some Lenovo Notebook models BIOS may allow an attacker with local access and elevated privileges to execute arbitrary code.
How severe is CVE-2021-3970?: CVE-2021-3970 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-2021-3970 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3970?: CVE-2021-3970 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-2021-3970?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3970 published?: CVE-2021-3970 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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