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Nport 6150 T FirmwareOperating system · Moxa

CVE-2023-5627

HIGH · 7.5 CVSS v3.1 Published 2023-11-01
Fix available
A fix is available. Upgrade to after 1.21 or later.
See remediation →
84/100
Remediation priority · High
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 vulnerability has been identified in NPort 6000 Series, making the authentication mechanism vulnerable. This vulnerability arises from the incorrect implementation of sensitive information protection, potentially allowing malicious users to gain unauthorized access to the web service.

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

The NPort 6000 Series serial-to-Ethernet device servers have a vulnerability in their authentication mechanism due to incorrect handling of sensitive information. This could allow malicious users to gain unauthorized access to the web interface, likely through exposure or interception of credentials or session data.

MitigationApply the vendor firmware update when available, or implement compensating controls such as network segmentation, strong alternative authentication, and restricting web service access to trusted networks until the patch can be deployed.

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
Nport 6150 T FirmwareOperating system
Affected:<= 1.21
Nport 6150 FirmwareOperating system
Affected:<= 1.21
Nport 6250 M Sc T FirmwareOperating system
Affected:<= 1.21
Nport 6250 M Sc FirmwareOperating system
Affected:<= 1.21
Nport 6250 S Sc T FirmwareOperating system
Affected:<= 1.21
Nport 6250 S Sc FirmwareOperating system
Affected:<= 1.21
Nport 6250 T FirmwareOperating system
Affected:<= 1.21
Nport 6250 FirmwareOperating system
Affected:<= 1.21

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
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

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 the NPort device model
    Access the web interface or check the device label/console output to confirm the exact model (Nport 6150, 6150 T, 6250, 6250 M Sc, 6250 S Sc, or 6250 T variants).
    Affected if The device is any NPort 6150 or 6250 series model listed in the affected products.
  2. Check the firmware version
    Log into the web interface and navigate to System Settings or Device Management to view the firmware version. Alternatively, use the console or SNMP to query the firmware version.
    Affected if The firmware version is 1.21 or lower.
  3. Verify web interface accessibility
    Attempt to access the device web interface over HTTP/HTTPS from the network. Check if port 80 or 443 (or custom web service ports) are listening and reachable.
    Affected if The web interface is exposed and reachable on the network.
  4. Review authentication configuration
    Examine the web interface user accounts and authentication settings. Look for weak passwords, default credentials, or misconfigured access controls.
    Affected if Default credentials are in use or authentication is improperly configured.
  5. Check for credential exposure
    Inspect network traffic to/from the device using a packet capture tool. Look for credentials being transmitted in cleartext or predictable session handling.
    Affected if Credentials or session data are transmitted insecurely.

A user is affected if they have any NPort 6150 or 6250 series device running firmware version 1.21 or lower with an exposed web interface.

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 1.21
Interim mitigation

Apply the vendor firmware update when available, or implement compensating controls such as network segmentation, strong alternative authentication, and restricting web service access to trusted networks until the patch can be deployed.

Recommended fix Moderate confidence

Firmware version > 1.21 (check Moxa website for exact latest stable release)

  1. 1. Visit the official Moxa support website at www.moxa.com to download the latest firmware version for your NPort device model
  2. 2. Identify your specific NPort model (e.g., NPort 6150, NPort 6250 M Sc T, etc.)
  3. 3. Navigate to the product support or downloads section for your specific model
  4. 4. Download the firmware update file
  5. 5. Access the NPort web interface using administrator credentials
  6. 6. Navigate to the firmware upgrade or system maintenance section
  7. 7. Upload and apply the new firmware version
  8. 8. After upgrade, verify the firmware version displayed in the web interface matches the downloaded version
Caveat Review Moxa release notes for any configuration or feature changes between versions before upgrading

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

Fix this in Nport 6150 T Firmware Scoped from the published advisory
  • Consultation6.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA3.0 h
17.0 hours of engineering $3,060
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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-2023-5627 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