CVE-2021-3971

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.

Remediation

Solution:

  • Update system firmware to the version (or newer) indicated for your model in the Product Impact section of LEN-73440.

Category

6.7
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 4.18% Top 15%
Vendor Advisory lenovo.com
Affected: Lenovo Notebook BIOS
Published at:
Updated at:

References

Link Tags
https://support.lenovo.com/us/en/product_security/LEN-73440 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-3971?
CVE-2021-3971 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3971?
To fix CVE-2021-3971: Update system firmware to the version (or newer) indicated for your model in the Product Impact section of LEN-73440.
Is CVE-2021-3971 being actively exploited in the wild?
It is possible that CVE-2021-3971 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3971?
CVE-2021-3971 affects Lenovo Notebook BIOS.
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