CVE-2025-4338
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 · uneditedLantronix Device installer is vulnerable to XML external entity (XXE) attacks in configuration files read from the network device. An attacker could obtain credentials, access these network devices, and modify their configurations. An attacker may also gain access to the host running the Device Installer software or the password hash of the user running the application.
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 · high confidenceLantronix Device Installer contains an XML External Entity (XXE) vulnerability when parsing configuration files from network devices. The application's XML parser processes external entity references, allowing an attacker to craft malicious XML configuration files that can read local system files, expose credentials, obtain password hashes from the user running the application, and potentially gain host access.
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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L
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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Locate Lantronix Device Installer installationSearch for the application in typical installation directories such as C:\Program Files\Lantronix\ or C:\Program Files (x86)\Lantronix\, or check the Windows Programs and Features list.Affected if The application is present on the system.
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Identify installed versionOpen the application directory and look for a version file, or right-click the executable and select Properties to view the File Version details.Affected if The version cannot be determined or is unknown, indicating the software may be unpatched.
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Verify XML configuration import feature existsLaunch the application and examine the menu options or interface for any functionality that imports or loads configuration files from network devices.Affected if The application includes features to load or import XML configuration files.
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Check for XML parser behaviorAttempt to import a benign XML configuration file and observe if the application parses it without error. No direct exploitation should be performed.Affected if The application successfully parses XML configuration files, indicating the XXE-vulnerable parser is in use.
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Review application runtime contextNote the privileges under which the Lantronix Device Installer runs. Check if it executes with elevated permissions or accesses sensitive directories.Affected if The application runs with elevated privileges or accesses sensitive system areas, increasing the potential impact of XXE.
A user is affected if Lantronix Device Installer is installed and includes functionality to import or parse XML configuration files from network devices.
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 dataDisable external entity processing in the XML parser or implement input validation to reject XML containing DTD references and external entity declarations until a vendor patch is available.
- Consultation2.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-4338 — 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-2025-4338 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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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.
- 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
- No spam, self-promotion, credentials, or personal data