dbcve.org
MxviewApplication · Moxa

CVE-2021-38454

CRITICAL · 10.0 CVSS v3.1 Published 2021-10-12
Fix available
A fix is available. Upgrade to after 3.2.2 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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
A path traversal vulnerability in the Moxa MXview Network Management software Versions 3.x to 3.2.2 may allow an attacker to create or overwrite critical files used to execute code, such as programs or libraries.

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 confidence

A path traversal vulnerability in Moxa MXview Network Management software versions 3.x through 3.2.2 allows remote attackers to manipulate file paths and write arbitrary files to the filesystem, potentially overwriting executable programs or shared libraries to achieve code execution.

MitigationApply vendor-supplied patch/upgrade to a fixed version; if no patch available, implement network segmentation to restrict MXview exposure and disable unnecessary file write capabilities in the application configuration.

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

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
MxviewApplication
Affected:>= 3.0, <= 3.2.2

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
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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. Verify Moxa MXview installation
    Check for MXview installation directory - common paths include C:\Program Files\Moxa\MXview or /opt/mxview on Linux. Look for mxview.exe or mxview service processes running.
    Affected if MXview software is installed on the system
  2. Determine installed MXview version
    Open the MXview web interface and navigate to Help > About, or check the version in the installation directory (often in a version.txt or in the executable properties). On Windows, right-click mxview.exe and select Properties > Details to view File Version.
    Affected if Installed version is 3.0 through 3.2.2 inclusive
  3. Confirm web management interface is accessible
    Access the MXview web interface via browser at https://localhost:8080 or the configured port. Check if the login page or management console loads.
    Affected if The MXview web interface is reachable (vulnerability is exploitable remotely through this interface)
  4. Verify network exposure of management interface
    Check if the MXview web port (default 8080 or 8443) is bound to all interfaces or is externally accessible. Use netstat -an | findstr 8080 on Windows or netstat -tlnp | grep -E '8080|8443' on Linux to check listening addresses.
    Affected if MXview web interface is bound to 0.0.0.0 or otherwise accessible from untrusted networks

You are affected if Moxa MXview version 3.0 through 3.2.2 is installed and its web management interface is network-accessible, as the path traversal flaw allows remote file writes.

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.

dbcve · scoped
Upgrade available Upgrade to a release after 3.2.2
Interim mitigation

Apply vendor-supplied patch/upgrade to a fixed version; if no patch available, implement network segmentation to restrict MXview exposure and disable unnecessary file write capabilities in the application configuration.

Recommended fix High confidence

Mxview version 3.2.3 or later (any version above 3.2.2)

  1. 1. Identify the current Mxview installation version by checking the software or system documentation
  2. 2. Confirm the installed version is within the affected range (3.0 through 3.2.2)
  3. 3. Back up all critical configuration files and data according to organizational backup procedures
  4. 4. Download the latest stable Mxview version from the official Moxa vendor website or authorized distribution channel
  5. 5. Follow Moxa's official upgrade documentation to install the newer version, ensuring all prerequisites are met
  6. 6. Verify the upgrade was successful by confirming the new version number in the software interface
  7. 7. Test critical functionality to ensure normal operations have resumed
Caveat Review Moxa release notes for the target version to check for any configuration or feature changes that may require adjustment

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Mxview Scoped from the published advisory
  • Consultation4.0 h
  • Implementation4.0 h
  • Testing6.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,780
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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-2021-38454 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
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data