CVE-2025-30033
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 · uneditedThe affected setup component is vulnerable to DLL hijacking. This could allow an attacker to execute arbitrary code when a legitimate user installs an application that uses the affected setup component.
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 confidenceA DLL hijacking vulnerability exists in a setup component, allowing an attacker to place a malicious DLL in a location where it gets loaded before the legitimate DLL during application installation, leading to arbitrary code execution.
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
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/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 checksWork through these to decide whether this CVE applies to you.
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Identify installed setup components in the environmentReview installed software list (via Programs and Features, registry keys HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall, or powershell Get-ItemProperty 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*'). Look for applications with setup/installation components.Affected if A vulnerable setup component matching the CVE description is installed and has not been patched.
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Check application installation directories for suspicious DLLsInspect the bin or installation directories of identified setup components. Look for DLL files that were not originally part of the installation (compare current contents against known-good installation state or hash baselines).Affected if Unexpected or unsigned DLL files exist in directories that the setup component loads from before system directories.
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Review DLL search path configurationUse Process Monitor or equivalent tooling to trace DLL loading during setup execution. Examine if the application uses relative paths for DLL loading instead of absolute paths.Affected if The setup component loads DLLs from the application directory or current working directory without full path specification, allowing DLL search order hijacking.
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Verify DLL file integrity and signingRight-click suspicious DLL files, go to Properties > Digital Signatures tab. Verify the signature is valid and the signer matches the legitimate vendor. Also check file hashes against known-good baselines.Affected if DLLs in the application directory are unsigned, have invalid signatures, or are not from the legitimate software vendor.
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Monitor DLL loading behavior during setup executionRun the setup component under monitoring (Process Monitor, API monitoring) to observe which DLLs are loaded and from which paths. Check for DLLs loaded from user-writable locations.Affected if The setup loads DLLs from locations writable by non-privileged users (e.g., temp directories, application directory) before secure system directories.
The environment is affected if a vulnerable setup component exists, it loads DLLs from relative or insecure paths, and unsigned or unexpected DLLs are present in directories that are searched before secure system directories.
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 dataFix the DLL loading by using absolute paths, validating DLL signatures, or ensuring the application searches secure directories first; apply any available vendor patch.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-30033 — 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-2025-30033 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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