CVE-2018-7521
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 · uneditedIn Omron CX-Supervisor Versions 3.30 and prior, use after free vulnerabilities can be exploited when CX Supervisor parses a specially crafted project file.
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 confidenceOmron CX-Supervisor versions 3.30 and prior contain use-after-free vulnerabilities during project file parsing. When the software opens a specially crafted malicious project file, it fails to properly manage memory allocation/deallocation, allowing an attacker to potentially execute arbitrary code or cause a denial of service by freeing memory that is still being referenced.
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<= 3.30CVSS 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
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/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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Confirm CX-Supervisor installationLook for the CX-Supervisor installation directory, typically under C:\Program Files\Omron\CX-Supervisor or C:\Program Files (x86)\Omron\CX-Supervisor. Check for the presence of the main executable file (CX-Supervisor.exe or similar) in these locations.Affected if The software is present on the system.
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Identify installed CX-Supervisor versionRight-click on the CX-Supervisor executable file (e.g., CX-Supervisor.exe) in the installation directory, select Properties, and view the Details tab to find the Product Version. Alternatively, open the software and check Help > About CX-Supervisor for the version number.Affected if The installed version is 3.30 or any version prior to 3.30.
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Verify project file handling exposureDetermine whether CX-Supervisor is configured to automatically open or frequently used to open project files (.spj, .supervisor, or similar project file extensions). Check recent file history or default project file associations in the Windows system.Affected if The software is used to open project files from untrusted sources, which is the attack vector for this vulnerability.
A system is affected by this CVE if CX-Supervisor version 3.30 or earlier is installed and users open project files, since the use-after-free vulnerability is triggered during malicious project file parsing.
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 dataUpgrade to a patched version of CX-Supervisor if available; otherwise, implement strict file handling controls by only opening project files from trusted sources and consider running the software in a sandboxed or isolated environment to limit the impact of potential exploitation.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-7521 — 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-2018-7521 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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