CVE-2018-19021
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 · uneditedA specially crafted script could bypass the authentication of a maintenance port of Emerson DeltaV DCS Versions 11.3.1, 11.3.2, 12.3.1, 13.3.1, 14.3, R5.1, R6 and prior, which may allow an attacker to cause a denial of service.
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 confidenceEmerson DeltaV DCS contains an authentication bypass vulnerability in its maintenance port. A specially crafted script can bypass authentication mechanisms, allowing unauthorized access to the maintenance interface which can then be exploited to cause denial of service conditions.
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>= r5.1, <= r6= 11.3.1= 11.3.2= 12.3.1= 13.3.1= 14.3CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 installed DeltaV versionLocate the DeltaV version information in the system about or control system configuration. Common locations include the operator station, engineering station, or system documentation.Affected if The installed version matches >= r5.1 and <= r6, OR equals 11.3.1, 11.3.2, 12.3.1, 13.3.1, or 14.3
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Locate the maintenance portIdentify the maintenance port configuration in DeltaV network settings or system documentation. The maintenance interface typically uses a dedicated port for remote administration access.Affected if The maintenance port is configured and active on the system
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Verify network accessibility of maintenance portUse network scanning tools to determine if the maintenance port is listening and accessible from network segments. Check firewall rules and network configuration.Affected if The maintenance port is exposed and reachable from network segments outside the isolated control system environment
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Test maintenance interface authenticationAttempt to access the maintenance interface from an unauthorized network location to verify if authentication is enforced or can be bypassed.Affected if Authentication can be bypassed or the interface accepts unauthenticated requests
Your environment is affected if the installed DeltaV version falls within the listed affected ranges and the maintenance port is network-accessible.
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 dataApply vendor patches or updates for affected DeltaV DCS versions. If no patch available, restrict network access to maintenance ports via network segmentation and firewall rules, and monitor for unauthorized access attempts.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $12,352.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-19021 — 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-2018-19021 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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