CVE-2022-3431

Secure Boot disablement via exposed manufacturing driver

Published Oct 9, 2023 · Updated Sep 19, 2024

Incorrect default permissions in Lenovo Notebook BIOS with various affected firmware versions allow local users to disable Secure Boot. A manufacturing-process firmware driver was mistakenly left active and accepts privileged writes to the NVRAM variable controlling Secure Boot. Local elevated privileges are required; successful modification disables a boot-integrity control and enables persistent pre-OS tampering.

CVSS severity6.7
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect default permissions in Lenovo Notebook BIOS with various affected firmware versions allow local users to disable Secure Boot. A manufacturing-process firmware driver was mistakenly left active and accepts privileged writes to the NVRAM variable controlling Secure Boot. Local elevated privileges are required; successful modification disables a boot-integrity control and enables persistent pre-OS tampering.

The record

CVE
CVE-2022-3431
Published
Oct 9, 2023
Updated
Sep 19, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-276, T1542.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 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

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.7Lenovo Group Ltd.CVSS:3.1/AV:L/AC:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1542.001Pre-OS Boot: System Firmware

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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