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Uncontrolled Search Path (DLL Hijack)Weakness · CWE-427

CVE-2026-4134

HIGH · 7.3 CVSS v3.1 Published 2026-04-15
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
73/100
Remediation priority · Elevated

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
During an internal security assessment, a potential vulnerability was discovered in Lenovo Software Fix, that during installation could allow a local authenticated user to execute code with elevated privileges.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

This is a local privilege escalation vulnerability in Lenovo Software Fix where during the installation process, an authenticated local user can execute code with elevated (SYSTEM/administrator) privileges. The vulnerability likely involves improper handling of privileges or potential DLL/service manipulation during the installation workflow.

MitigationApply vendor-supplied patches from Lenovo when available. In the interim, restrict execution privileges for Lenovo Software Fix to administrator accounts only and monitor for suspicious installation behavior.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify Lenovo Software Fix installation
    Check for Lenovo Software Fix by examining the Windows registry under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall for Lenovo entries, or look in Program Files for a Lenovo Software Fix folder
    Affected if The Lenovo Software Fix application is present on the system
  2. Determine installed version
    Locate the installed version by checking the version information of the main executable (typically named LenovoSoftwareFix.exe or similar in the installation directory), right-click the .exe, select Properties, and view the Details tab for FileVersion or ProductVersion
    Affected if The installed version falls within any affected version range provided by Lenovo security advisories or cannot be verified against known-safe versions
  3. Verify installation service configuration
    Open Services.msc and examine any Lenovo-related installation or update services for their configured Log On account (typically LocalSystem or SYSTEM for installer services) and verify if they allow low-privilege users to trigger privileged operations
    Affected if A service associated with Lenovo Software Fix runs with elevated privileges and permits interaction from authenticated local users
  4. Inspect installation directories for unauthorized DLLs
    Navigate to the Lenovo Software Fix installation directory and examine all .dll files present, checking their digital signatures and timestamps for any unsigned or recently added DLLs that may have been injected
    Affected if Unsigned DLLs or DLLs with mismatched signatures are present in the installation directory alongside legitimate Lenovo binaries
  5. Review installation logs for privilege escalation indicators
    Examine Windows Event Viewer logs under Windows Logs > Application and Setup for installation events from Lenovo Software Fix, looking for entries where a low-privilege user account initiated a process running under SYSTEM
    Affected if Installation logs show execution under SYSTEM or administrator context initiated by an authenticated non-privileged user account

A user is affected if Lenovo Software Fix is installed and running a version where authenticated local users can trigger privileged code execution during installation operations.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply vendor-supplied patches from Lenovo when available. In the interim, restrict execution privileges for Lenovo Software Fix to administrator accounts only and monitor for suspicious installation behavior.

Have this fixed Scoped from the published advisory
  • Consultation6.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA3.0 h
21.0 hours of engineering $3,780
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-4134 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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