CVE-2023-32540
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 Advantech WebAccss/SCADA v9.1.3 and prior, there is an arbitrary file overwrite vulnerability, which could allow an attacker to overwrite any file in the operating system (including system files), inject code into an XLS file, and modify the file extension, which could lead to arbitrary code execution.
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 confidenceAdvantech WebAccess/SCADA versions 9.1.3 and prior contain an arbitrary file overwrite vulnerability that allows unauthenticated attackers to write to any file on the operating system, including critical system files. Attackers can inject malicious code into XLS files and modify file extensions, enabling arbitrary code execution on the affected system.
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<= 9.1.3CVSS 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 checksWork through these to decide whether this CVE applies to you.
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Locate Advantech WebAccess/SCADA installationSearch for the WebAccess installation directory (commonly under C:\WebAccess or C:\Advantech\WebAccess on Windows), or check for the WebAccess SCADA service running on the systemAffected if The software is installed and the service is running
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Determine the installed versionOpen the WebAccess/SCADA application and navigate to the About or Help section to view the version number, or check the version information in the installation directory if accessibleAffected if The version number is 9.1.3 or lower
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Verify the web interface is exposedCheck if the WebAccess web server (typically port 80 or 443) is listening and accessible from the network by reviewing firewall rules and active network listenersAffected if The web interface is accessible from network locations, indicating potential remote exploitation vector
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Confirm unauthenticated access is possibleAttempt to access the WebAccess/SCADA login page without credentials to verify if the authentication mechanism is enabled or if the service permits unauthenticated requestsAffected if The interface allows unauthenticated access or the login mechanism is not enforcing authentication
A system is affected if Advantech WebAccess/SCADA version 9.1.3 or lower is installed with its web interface exposed to the network, allowing unauthenticated file operations.
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 version newer than v9.1.3. If immediate patching is not feasible, restrict network access to the WebAccess/SCADA interface using network segmentation and firewall rules to minimize exposure.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2023-32540 — 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-2023-32540 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
- No weaponised exploit code, or anything meant to cause harm
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