WebaccessApplication · Advantech

CVE-2019-10985

CRITICAL · 9.1 CVSS v3.1 Published 2019-06-28
Fix available
A fix is available. Upgrade to after 8.3.5 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 WebAccess/SCADA, Versions 8.3.5 and prior, a path traversal vulnerability is caused by a lack of proper validation of a user-supplied path prior to use in file operations. An attacker can leverage this vulnerability to delete files while posing as an administrator.

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

WebAccess/SCADA versions 8.3.5 and prior contain a path traversal vulnerability where user-supplied paths are not validated before file operations. An attacker with administrator privileges can manipulate path inputs to delete arbitrary files on the system.

MitigationImplement strict input validation and sanitization on all user-supplied path parameters, using allowlists and canonicalization to prevent directory traversal sequences (../) from reaching file operation functions.

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
WebaccessApplication
Affected:<= 8.3.5

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
None
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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 Advantech WebAccess version
    Locate the WebAccess installation directory or check the program version through Windows Add/Remove Programs, or look for version information in the application's about/help section
    Affected if The installed version is 8.3.5 or any version lower than 8.3.5
  2. Confirm administrator role is accessible
    Verify if the WebAccess administrator interface is accessible or if admin accounts exist in the system. Check user role configurations in the WebAccess management console
    Affected if Administrator privileges can be obtained or are already configured on the system
  3. Check if file management features are exposed
    Identify if WebAccess exposes any file operation functionality (file upload, download, delete, or backup features) accessible via the web interface or API
    Affected if File operation features are enabled and accessible through the web interface
  4. Review path handling in WebAccess
    Inspect any WebAccess configuration files or logs that show how user-supplied path parameters are processed. Look for endpoints that accept file path inputs
    Affected if The application accepts user-supplied paths without visible validation or canonicalization checks

You are affected if WebAccess version 8.3.5 or lower is installed AND administrator access exists AND file operation features are exposed through the interface.

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 8.3.5
Interim mitigation

Implement strict input validation and sanitization on all user-supplied path parameters, using allowlists and canonicalization to prevent directory traversal sequences (../) from reaching file operation functions.

Fix this in Webaccess Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,860
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.

Scan for this in your stack

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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-2019-10985 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