CVE-2016-4502
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 · uneditedEnvironmental Systems Corporation (ESC) 8832 Data Controller 3.02 and earlier allows remote attackers to bypass intended access restrictions and execute arbitrary functions via a modified parameter.
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 confidenceThe ESC 8832 Data Controller versions 3.02 and earlier contains an authentication bypass vulnerability where remote attackers can modify parameters to bypass intended access restrictions and execute arbitrary functions on the industrial control device.
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<= 3.02CVSS 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
- None
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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 the ESC 8832 firmware versionAccess the device web interface, administrative console, or check the device status page for firmware version information. Compare against the version displayed in the device management or About section.Affected if The displayed firmware version is 3.02 or any version lower than 3.02
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Verify network accessibility of the deviceDetermine if the ESC 8832 Data Controller has any of its management interfaces (web UI, API endpoints, remote access services) exposed to network segments beyond the trusted internal network. Use network scanning or review firewall rules.Affected if The device management interface is reachable from network segments outside the isolated control system network
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Check if remote management or API features are enabledReview the device configuration settings for any enabled remote management protocols, XML API, or web service endpoints that accept parameter modifications. Look for settings related to remote access, web services, or parameter passing.Affected if Remote management features, API endpoints, or web service interfaces that accept parameter input are enabled and accessible
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Inspect for unauthorized configuration changesReview system logs, audit trails, or configuration change logs for any unexpected or unauthorized modifications to device parameters, access control settings, or function execution commands.Affected if Logs show parameter modifications or function executions that were not initiated by legitimate administrators
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Confirm the device is an Envirosys ESC 8832 Data ControllerVerify the exact model and manufacturer by checking the device label, web interface header, boot messages, or SNMP sysDescr response. Confirm it is the Envirosys Esc 8832 Data Controller model.Affected if The device is positively identified as an Envirosys Esc 8832 Data Controller with firmware version 3.02 or earlier
A user is affected if they have an Envirosys ESC 8832 Data Controller with firmware version 3.02 or lower that has its management interface or remote API accessible from a network, as this allows the authentication bypass to be exploited.
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 dataIsolate the ESC 8832 Data Controller on a dedicated network segment with strict firewall rules; if available, apply vendor firmware updates; implement compensating controls such as robust logging and intrusion detection for anomalous parameter modifications.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $11,200.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-4502 — 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-2016-4502 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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