CVE-2021-4212

Description

A potential vulnerability in the SMI callback function used in the Legacy BIOS mode driver in some Lenovo Notebook models may allow an attacker with local access and elevated privileges to execute arbitrary code.

Remediation

Solution:

  • Update system firmware to the version (or newer) indicated for your model in the Product Impact section in LEN-77639.

Category

6.7
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.11%
Vendor Advisory lenovo.com
Affected: Lenovo BIOS
Published at:
Updated at:

References

Link Tags
https://support.lenovo.com/us/en/product_security/LEN-77639 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-4212?
CVE-2021-4212 has been scored as a medium severity vulnerability.
How to fix CVE-2021-4212?
To fix CVE-2021-4212: Update system firmware to the version (or newer) indicated for your model in the Product Impact section in LEN-77639.
Is CVE-2021-4212 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-4212 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-4212?
CVE-2021-4212 affects Lenovo BIOS.
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