CVE-2019-9507
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 · uneditedThe web interface of the Vertiv Avocent UMG-4000 version 4.2.1.19 is vulnerable to command injection because the application incorrectly neutralizes code syntax before executing. Since all commands within the web application are executed as root, this could allow a remote attacker authenticated with an administrator account to execute arbitrary commands as root.
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 confidenceThe Vertiv Avocent UMG-4000 web interface version 4.2.1.19 is vulnerable to OS command injection due to improper neutralization of code syntax. An authenticated administrator can inject and execute arbitrary OS commands, and because the web application runs as root, these commands execute with full root privileges.
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= 4.2.1.19CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/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 the device modelLocate the hardware label or access the admin console to confirm the device is a Vertiv Avocent UMG-4000Affected if The device is not a Vertiv Avocent UMG-4000
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Check the firmware versionAccess the web interface admin panel or use the command line interface to retrieve the installed firmware versionAffected if The firmware version is exactly 4.2.1.19
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Verify the web interface is accessibleAttempt to reach the UMG-4000 web interface via HTTP/HTTPS on the expected management portAffected if The web interface is exposed and reachable from a network where attackers could attempt authentication
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Confirm administrative authentication is enabledCheck the web interface security settings to verify that administrator authentication is required for accessAffected if Authentication is disabled or uses weak default credentials, making unauthorized admin access possible
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Review for signs of command injection exploitationExamine system logs, process lists, or network connections for unexpected commands, scripts, or outbound connections that may indicate exploitation attemptsAffected if Logs show unexpected shell commands, new scheduled tasks, or unfamiliar processes running as root
You are affected only if the device is a Vertiv Avocent UMG-4000 running firmware version 4.2.1.19 and the web interface is accessible to authenticated administrators.
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-supplied firmware patch if available; otherwise implement compensating controls such as network segmentation, strict access control lists, and monitoring for administrative activity to reduce exposure.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-9507 — 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-2019-9507 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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