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Cmt Fhd FirmwareOperating system · Weintek

CVE-2023-38584

CRITICAL · 9.8 CVSS v3.1 Published 2023-10-19
Fix available
A fix is available. Upgrade to 20210206 / 20210212 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
In Weintek's cMT3000 HMI Web CGI device, the cgi-bin command_wb.cgi contains a stack-based buffer overflow, which could allow an anonymous attacker to hijack control flow and bypass login authentication.

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 stack-based buffer overflow vulnerability exists in the cgi-bin/command_wb.cgi component of Weintek cMT3000 HMI Web CGI devices. This flaw allows anonymous attackers to potentially hijack control flow and bypass the login authentication mechanism, granting unauthorized access.

MitigationApply vendor-supplied patches for the cMT3000 firmware; if unavailable, implement network segmentation to isolate the HMI from untrusted networks and disable or block access to the vulnerable CGI interface.

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
Cmt Fhd FirmwareOperating system
Affected:< 20210212
Cmt Hdm FirmwareOperating system
Affected:< 20210206
Cmt3071 FirmwareOperating system
Affected:< 20210220
Cmt3072 FirmwareOperating system
Affected:< 20210220
Cmt3090 FirmwareOperating system
Affected:< 20210220
Cmt3103 FirmwareOperating system
Affected:< 20210220
Cmt3151 FirmwareOperating system
Affected:< 20210220

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
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify the cMT3000 HMI model
    Access the device web interface or check the physical device label to confirm the exact model (e.g., Cmt3071, Cmt3090, Cmt3103, Cmt3151, Cmt Fhd, Cmt Hdm)
    Affected if The device is any of the listed cMT3000 series models
  2. Check the installed firmware version
    Log into the device web interface and navigate to System Settings > Firmware Information, or access the device via FTP/Telnet and retrieve the firmware build date
    Affected if The firmware version/build date is older than 20210212 for Cmt Fhd, older than 20210206 for Cmt Hdm, or older than 20210220 for Cmt3071/3072/3090/3103/3151
  3. Verify the CGI interface is accessible
    Attempt to access http://<device_ip>/cgi-bin/command_wb.cgi from a browser or curl command
    Affected if The CGI script responds (even with an error) indicating it is present and enabled
  4. Confirm web authentication is not enforced
    Send a crafted request to the command_wb.cgi endpoint without providing valid credentials, observing if authentication is bypassed
    Affected if The endpoint processes requests without requiring login credentials, indicating the authentication bypass is present

The environment is affected if the device is a Weintek cMT3000 series HMI running firmware older than the specified version thresholds and the CGI interface is accessible without authentication.

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 20210206 / 20210212 / 20210220 or later
Fixed in 202102062021021220210220
Interim mitigation

Apply vendor-supplied patches for the cMT3000 firmware; if unavailable, implement network segmentation to isolate the HMI from untrusted networks and disable or block access to the vulnerable CGI interface.

Recommended fix Moderate confidence

Firmware version >= 20210212 (Fhd), >= 20210206 (Hdm), or >= 20210220 (3071/3072/3090/3103/3151)

  1. 1. Identify the specific cMT3000 HMI model (Fhd, Hdm, 3071, 3072, 3090, 3103, or 3151) from the affected product line
  2. 2. Download the latest firmware version from dl.weintek.com appropriate for your model
  3. 3. For Cmt Fhd: upgrade to firmware version 20210212 or later
  4. 4. For Cmt Hdm: upgrade to firmware version 20210206 or later
  5. 5. For Cmt3071, Cmt3072, Cmt3090, Cmt3103, Cmt3151: upgrade to firmware version 20210220 or later
  6. 6. Verify the firmware upgrade was successful and confirm the new version number
  7. 7. Test that the web interface and authentication are functioning properly
Caveat Review Weintek release notes for any configuration or functionality changes between versions; backup current HMI configuration before upgrading

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

Fix this in Cmt Fhd Firmware Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
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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-2023-38584 in production — separate from our analysis above.

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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