CVE-2021-3786

Description

A potential vulnerability in the SMI callback function used in CSME configuration of some Lenovo Notebook and ThinkPad systems could be used to leak out data out of the SMRAM range.

Remediation

Solution:

  • Update system firmware to the version (or newer) indicated for your model in the Product Impact section of LEN-67440.

Category

4.4
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.11%
Vendor Advisory lenovo.com
Affected: Lenovo Notebook and ThinkPad BIOS
Published at:
Updated at:

References

Link Tags
https://support.lenovo.com/us/en/product_security/LEN-67440 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-3786?
CVE-2021-3786 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3786?
To fix CVE-2021-3786: Update system firmware to the version (or newer) indicated for your model in the Product Impact section of LEN-67440.
Is CVE-2021-3786 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3786 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-2021-3786?
CVE-2021-3786 affects Lenovo Notebook and ThinkPad BIOS.
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