How severe is CVE-2021-3452?

CVE-2021-3452 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-3452 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3452?

CVE-2021-3452 affects Lenovo Bios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3452?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-3452 published?

CVE-2021-3452 was published on 2021-07-16 and last updated on 2026-06-17.

CVE-2021-3452

CVE-2021-3452 is a medium-severity vulnerability in Lenovo Bios with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v2: 4.6
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Lenovo Bios
Published: 2021-07-16
Last modified: 2026-06-17

Description

A potential vulnerability in the system shutdown SMI callback function in some ThinkPad models may allow an attacker with local access and elevated privileges to execute arbitrary code.

Frequently asked questions

What is CVE-2021-3452?: A potential vulnerability in the system shutdown SMI callback function in some ThinkPad models may allow an attacker with local access and elevated privileges to execute arbitrary code.
How severe is CVE-2021-3452?: CVE-2021-3452 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-3452 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3452?: CVE-2021-3452 affects Lenovo Bios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3452?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3452 published?: CVE-2021-3452 was published on 2021-07-16 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:o:lenovo:bios:-:*:*:*:*:*:*:*

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