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Vulnerability record · CVE-2021-3453 · published 16 July 2021

CVE-2021-3453: Lenovo thinkpad helix firmware vulnerability

Lenovo · Thinkpad Helix Firmware

Some Lenovo Notebook, ThinkPad, and Lenovo Desktop systems have BIOS modules unprotected by Intel Boot Guard that could allow an attacker with physical access the ability to write to the SPI flash storage.

4.6 CVSS 3.1 Medium EPSS 0.24% · top 86.5% CWE-693 · CWE-693
4.6CVSS 3.1 base score, v2 2.1
0.24%EPSS exploitation probability, 30 days
NoNot in CISA KEV
21Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Some Lenovo Notebook, ThinkPad, and Lenovo Desktop systems have BIOS modules unprotected by Intel Boot Guard that could allow an attacker with physical access the ability to write to the SPI flash storage.

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

Affected products

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

References

LinkTags
https://support.lenovo.com/us/en/product_security/LEN-65529 Vendor Advisory
https://support.lenovo.com/us/en/product_security/LEN-65529 Vendor Advisory

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

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Source: NIST National Vulnerability Database (record CVE-2021-3453), CISA KEV, FIRST EPSS (scores of 2026-10-17). This page is refreshed as NVD updates the record.