CVE-2020-8321

Local arbitrary code execution

Published Jun 9, 2020 · Updated Sep 17, 2024

Arbitrary code execution in Lenovo BIOS firmware on affected Notebook and ThinkStation models allows local users to execute code. The flaw resides in the System Lock Preinstallation driver's SMI callback, but Lenovo has not disclosed the invalid operation or triggering input. Exploitation requires high privileges and high-complexity local conditions and can compromise confidentiality, integrity, and availability.

CVSS severity6.4
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary code execution in Lenovo BIOS firmware on affected Notebook and ThinkStation models allows local users to execute code. The flaw resides in the System Lock Preinstallation driver's SMI callback, but Lenovo has not disclosed the invalid operation or triggering input. Exploitation requires high privileges and high-complexity local conditions and can compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2020-8321
Published
Jun 9, 2020
Updated
Sep 17, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 9, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
6.4Lenovo Group Ltd.CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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