CVE-2016-0859
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 · uneditedInteger overflow in the Kernel service in Advantech WebAccess before 8.1 allows remote attackers to execute arbitrary code or cause a denial of service (stack-based buffer overflow) via a crafted RPC request.
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 confidenceAn integer overflow vulnerability exists in the Kernel service of Advantech WebAccess versions prior to 8.1. Remote attackers can exploit this by sending crafted RPC requests that trigger a stack-based buffer overflow, potentially allowing arbitrary code execution or causing a denial of service.
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<= 8.0CVSS 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 is installedCheck for Advantech WebAccess installation on the system by looking for the application in installed programs list, or search for WebAccess-related directories and services.Affected if Advantech WebAccess is found installed on the system
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Determine the installed WebAccess versionLocate the version information for the installation, typically found in the application itself, its service properties, or installation directory metadata.Affected if The installed version is 8.0 or lower (any version prior to 8.1)
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Verify the Kernel service is present and runningCheck for the WebAccess Kernel service using system service management tools or by enumerating running services related to WebAccess.Affected if The Kernel service exists and is running or configured to run
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Assess RPC service exposureDetermine if the Kernel service RPC interface is network-accessible by checking firewall rules, listening ports, or RPC endpoint configuration for the service.Affected if The Kernel RPC service is exposed to the network or untrusted systems
A system is affected if it runs any version of Advantech WebAccess 8.0 or lower with the Kernel service accessible via RPC requests.
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.
dbcve · scopedUpgrade to Advantech WebAccess version 8.1 or later to obtain the patch. If immediate upgrading is not feasible, restrict network access to the Kernel service and implement RPC request filtering at network perimeter devices.
Advantech WebAccess 8.1
- 1. Identify all installations of Advantech WebAccess version 8.0 or earlier in the environment
- 2. Prioritize systems exposed to network/RPC traffic, as the vulnerability is exploitable remotely
- 3. Download Advantech WebAccess version 8.1 from the official Advantech website or authorized distribution channel
- 4. Review the WebAccess 8.1 release notes and migration documentation for any configuration or compatibility considerations
- 5. Create a backup of the current WebAccess configuration and database
- 6. Test the upgrade in a non-production environment first to verify compatibility with existing applications and integrations
- 7. Schedule a maintenance window for the production upgrade
- 8. Stop the WebAccess services before performing the upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation6.0 h
- Implementation12.0 h
- Testing10.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-0859 — 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-2016-0859 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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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.
- 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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