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Cx FlnetApplication · Omron

CVE-2018-8834

HIGH · 7.8 CVSS v3.1 Published 2018-04-17
Fix available
A fix is available. Upgrade to after 9.65 or later.
See remediation →
80/100
Remediation priority · High
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
Parsing malformed project files in Omron CX-One versions 4.42 and prior, including the following applications: CX-FLnet versions 1.00 and prior, CX-Protocol versions 1.992 and prior, CX-Programmer versions 9.65 and prior, CX-Server versions 5.0.22 and prior, Network Configurator versions 3.63 and prior, and Switch Box Utility versions 1.68 and prior, may cause a heap-based buffer overflow.

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

Heap-based buffer overflow vulnerability in Omron CX-One suite applications (CX-FLnet, CX-Protocol, CX-Programmer, CX-Server, Network Configurator, Switch Box Utility) when parsing malformed project files. The overflow occurs on the heap memory segment, potentially allowing arbitrary code execution with the privileges of the parsing process.

MitigationApply vendor patches when released; until then, implement compensating controls such as restricting access to project files, validating file origins, and applying least-privilege principles to affected systems.

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
Cx FlnetApplication
Affected:<= 1.00
Cx OneApplication
Affected:<= 4.42
Cx ProgrammerApplication
Affected:<= 9.65
Cx ProtocolApplication
Affected:<= 1.992
Cx ServerApplication
Affected:<= 5.0.22
Network ConfiguratorApplication
Affected:<= 3.63
Switch Box UtilityApplication
Affected:<= 1.68

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/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 installed Omron CX-One applications
    Open Windows Control Panel > Programs and Features, or run 'Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* | Select-Object DisplayName' in PowerShell to list installed software. Look for any of these: CX-FLnet, CX-Protocol, CX-Programmer, CX-Server, Network Configurator, Switch Box Utility, or CX-One.
    Affected if Any of the listed Omron applications appear in the installed programs list
  2. Check version of CX-Programmer if installed
    If CX-Programmer is installed, right-click its executable (typically in C:\Program Files\Omron\CX-Programmer\ or C:\Program Files (x86)\Omron\CX-Programmer\) and select Properties > Details to view the File Version.
    Affected if The reported version is 9.65 or lower
  3. Check version of CX-Server if installed
    If CX-Server is installed, locate the CXServer.exe file (commonly in C:\Program Files\Omron\CX-Server\ or C:\Program Files (x86)\Omron\CX-Server\) and view its file version via Properties > Details.
    Affected if The reported version is 5.0.22 or lower
  4. Check version of CX-Protocol if installed
    If CX-Protocol is installed, find its executable (typically in C:\Program Files\Omron\CX-Protocol\) and view the file version through Properties > Details.
    Affected if The reported version is 1.992 or lower
  5. Check version of CX-FLnet if installed
    If CX-FLnet is installed, locate its executable in the Omron program folder and view the file version via Properties > Details.
    Affected if The reported version is 1.00 or lower (any version up to 1.00)
  6. Check version of Network Configurator or Switch Box Utility if installed
    For Network Configurator, view the executable file version in C:\Program Files\Omron\Network Configurator\. For Switch Box Utility, check the version in C:\Program Files\Omron\Switch Box Utility\ or similar location.
    Affected if Network Configurator version is 3.63 or lower, or Switch Box Utility version is 1.68 or lower

You are affected if any of the Omron CX-One suite applications (CX-FLnet, CX-Protocol, CX-Programmer, CX-Server, Network Configurator, or Switch Box Utility) are installed and their installed versions fall at or below the limits listed in the affected versions for each product.

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.

From vendor data
Upgrade available Upgrade to a release after 9.65
Interim mitigation

Apply vendor patches when released; until then, implement compensating controls such as restricting access to project files, validating file origins, and applying least-privilege principles to affected systems.

Fix this in Cx Flnet Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
36.0 hours of engineering $6,400
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Scan for this in your stack

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dbcve dependency scanner

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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-2018-8834 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