CVE-2019-6519
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 · uneditedWebAccess/SCADA, Version 8.3. An improper authentication vulnerability exists that could allow a possible authentication bypass allowing an attacker to upload malicious data.
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 confidenceCVE-2019-6519 is an improper authentication vulnerability in WebAccess/SCADA version 8.3 that allows attackers to bypass authentication mechanisms and upload malicious data to the system. This critical flaw enables unauthenticated remote attackers to potentially compromise the SCADA infrastructure through malicious file uploads.
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= 8.3CVSS 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:3.0/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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Identify if Advantech WebAccess/SCADA is installedCheck system programs and services for Advantech WebAccess or WebAccess/SCADA. On Windows, check Programs and Features or the Services control panel. Look for 'Advantech WebAccess' or 'WebAccess/SCADA' entries.Affected if The product Advantech WebAccess/SCADA is present on the system
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Determine the installed version of WebAccess/SCADALocate the WebAccess installation directory (commonly in C:\Advantech\WebAccess or C:\inetpub\AdvantechWebAccess) and check version files, or access the web interface and look for version information typically displayed in the login page or about section.Affected if The installed version is exactly 8.3
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Verify remote access is enabledCheck if the WebAccess web server (typically IIS or internal web service) is running and accessible remotely. Check network listening ports (common ports include 80, 443, 8080) and firewall rules allowing external access to the SCADA system.Affected if The web interface is accessible from network locations and the system is version 8.3
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Confirm file upload functionality is presentLog into the WebAccess interface (if accessible) and navigate to project configuration, dashboard designer, or file management sections. Look for upload, import, or file attachment features that accept user-provided files.Affected if File upload features are enabled and the system is version 8.3
A system is affected if Advantech WebAccess/SCADA version 8.3 is installed with remote access and file upload functionality enabled.
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 WebAccess/SCADA to a patched version if available. If no patch exists, implement network segmentation to isolate the SCADA system, disable unnecessary remote access, and apply compensating controls such as web application firewalls (WAF) and strict access control lists.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-6519 — 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-2019-6519 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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