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Vulnerability record · CVE-2021-4211 · published 22 April 2022

CVE-2021-4211: Lenovo a340-22icb firmware improper input validation vulnerability

Lenovo · A340 22icb Firmware

A potential vulnerability in the SMI callback function used in the SMBIOS event log driver in some Lenovo Desktop, ThinkStation, and ThinkEdge models may allow an attacker with local access and elevated privileges to execute arbitrary code.

6.7 CVSS 3.1 Medium EPSS 0.26% · top 83.4% CWE-20 · Improper input validation
6.7CVSS 3.1 base score, v2 7.2
0.26%EPSS exploitation probability, 30 days
NoNot in CISA KEV
53Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A potential vulnerability in the SMI callback function used in the SMBIOS event log driver in some Lenovo Desktop, ThinkStation, and ThinkEdge models may allow an attacker with local access and elevated privileges to execute arbitrary code.

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

53 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.lenovo.com/us/en/product_security/LEN-77639 Vendor Advisory
https://support.lenovo.com/us/en/product_security/LEN-77639 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-4211), CISA KEV, FIRST EPSS (scores of 2026-10-16). This page is refreshed as NVD updates the record.