CVE-2021-3464

Local privilege escalation via uncontrolled DLL search

Published Apr 27, 2021 · Updated Aug 3, 2024

Uncontrolled DLL search in Lenovo PC Manager before 3.0.400.3252 allows local users to escalate privileges via DLL loading. The application loads a DLL through a search path that can resolve attacker-controlled code, but Lenovo has not disclosed the executable, DLL name, or searched directory. Exploitation requires low-privileged local access and executes the substituted library with the application's elevated privileges.

CVSS severity7.8
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled DLL search in Lenovo PC Manager before 3.0.400.3252 allows local users to escalate privileges via DLL loading. The application loads a DLL through a search path that can resolve attacker-controlled code, but Lenovo has not disclosed the executable, DLL name, or searched directory. Exploitation requires low-privileged local access and executes the substituted library with the application's elevated privileges.

The record

CVE
CVE-2021-3464
Published
Apr 27, 2021
Updated
Aug 3, 2024
Vendor
Lenovo
Product
Lenovo PC Manager
Classifications
CWE-427, T1574.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 27, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <3.0.400.3252

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Lenovo · Lenovo PC Managerversion=unspecified <3.0.400.3252

Published CVSS scores

7.8Lenovo Group Ltd.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
T1574.001Hijack Execution Flow: DLL

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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