How severe is CVE-2021-3971?

CVE-2021-3971 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-2021-3971 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-2021-3971?

CVE-2021-3971 primarily affects Lenovo Ideapad 3-14ada05 Firmware. In total, 73 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3971?

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

When was CVE-2021-3971 published?

CVE-2021-3971 was published on 2022-04-22 and last updated on 2026-06-17.

CVE-2021-3971

CVE-2021-3971 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: 1% (67th 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 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.

Frequently asked questions

What is CVE-2021-3971?: 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.
How severe is CVE-2021-3971?: CVE-2021-3971 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-2021-3971 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-2021-3971?: CVE-2021-3971 primarily affects Lenovo Ideapad 3-14ada05 Firmware. In total, 73 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3971?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3971 published?: CVE-2021-3971 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 (73)

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_3-15ada05_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_5-15ith6_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_y540-15irh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_y540-15irh-pg0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_y540-17irh_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_y540-17irh-pg0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:legion_y545_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Lenovo Ideapad 3-14ada05 Firmware

CVE-2022-1892 — Medium (CVSS 6.7): A buffer overflow in the SystemBootManagerDxe driver in some Lenovo Notebook products may allow an attacker with local…
CVE-2021-3972 — Medium (CVSS 6.7): A potential vulnerability by a driver used during manufacturing process on some consumer Lenovo Notebook devices' BIOS…
CVE-2021-3970 — Medium (CVSS 6.7): A potential vulnerability in LenovoVariable SMI Handler due to insufficient validation in some Lenovo Notebook models…

All CVEs affecting Lenovo Ideapad 3-14ada05 Firmware →

Other CWE-489 vulnerabilities

CVE-2023-4804 — Critical (CVSS 10.0): An unauthorized user could access debug features in Quantum HD Unity products that were accidentally exposed.
CVE-2026-49188 — Critical (CVSS 9.8): The ai_cmd utility executes with full root permissions. It pipes socket inputs directly to popen(), paving the way…
CVE-2024-46873 — Critical (CVSS 9.8): Multiple SHARP routers leave the hidden debug function enabled. An arbitrary OS command may be executed with the root…
CVE-2024-21785 — Critical (CVSS 9.8): A leftover debug code vulnerability exists in the Telnet Diagnostic Interface functionality of AutomationDirect P3-550E…
CVE-2024-32047 — Critical (CVSS 9.8): Hard-coded credentials for the CyberPower PowerPanel test server can be found in the production code. This might…
CVE-2024-28008 — Critical (CVSS 9.8): Active Debug Code in NEC Corporation Aterm WG1800HP4, WG1200HS3, WG1900HP2, WG1200HP3, WG1800HP3, WG1200HS2, WG1900HP,…

Browse all CWE-489 vulnerabilities →