CVE-2026-4135
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 · uneditedDuring an internal security assessment, a potential vulnerability was discovered in Lenovo Software Fix, that during installation could allow a local authenticated user to perform an arbitrary file write 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 confidenceThis is a local privilege escalation vulnerability in Lenovo Software Fix where an authenticated local user can leverage the installation process to perform arbitrary file writes with elevated (administrative/system) privileges. The vulnerability stems from improper permission handling or a race condition during the software installation workflow, potentially allowing a low-privileged user to write malicious files to protected locations.
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
- None
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/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 checksWork through these to decide whether this CVE applies to you.
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Identify Lenovo Software Fix installationSearch for Lenovo Software Fix in installed programs. On Windows, check Add/Remove Programs, or search for Lenovo installation directories in Program Files. On Linux, check package managers or typical installation paths.Affected if Lenovo Software Fix is present on the system
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Determine installed versionLocate the version information in the software's installation directory, typically in a version file, manifest, or executable metadata. Common locations include the main executable or an about/info dialog within the application.Affected if The version cannot be determined or is unknown relative to vendor advisories
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Verify installation directory permissionsInspect file system permissions on the Lenovo Software Fix installation directory and any temporary directories used during installation. Check if standard users have write access to these locations.Affected if Non-administrative users have write permissions to installation or temp directories used during the install process
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Assess user installation privilegesReview which local users have the ability to initiate or modify Lenovo Software Fix installations. Check group memberships and installation rights.Affected if Low-privileged authenticated users can trigger or influence the installation process
A user is likely affected if Lenovo Software Fix is installed and non-admin users can interact with or trigger its installation workflow, allowing potential privilege escalation via the installation process.
Generated from the published advisory. Verify against your own configuration.
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 dataApply vendor-provided patches when available. Until a patch is released, restrict installation of Lenovo Software Fix to trusted administrators only and monitor for suspicious installation behavior.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-4135 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-4135 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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