CVE-2025-43939
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 · uneditedDell Unity, version(s) 5.4 and prior, contain(s) an Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Command execution and Elevation of privileges.
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 confidenceDell Unity versions 5.4 and prior contain an OS command injection vulnerability allowing a low-privileged local attacker to execute arbitrary OS commands and escalate privileges to higher permission levels.
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< 5.5.2.0CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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 installed Dell Unity OE versionAccess the Unity Unisphere interface or use the Unity CLI 'version' command to retrieve the Operating Environment version numberAffected if The version displayed is 5.4.x or any version prior to 5.5.2.0
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Compare version to affected rangeDocument the full version string (for example, 5.4.0.0, 5.4.1.0, etc.) and verify it is less than 5.5.2.0Affected if The installed version is lower than 5.5.2.0
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Verify local user access configurationReview Unity system access controls to confirm whether low-privileged local user accounts exist and are permitted to access the system locallyAffected if Low-privileged local user accounts are enabled and have shell or command access
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Inspect for anomalous command executionReview system logs, audit trails, and command history for unexpected or unauthorized OS commands executed from the Unity management interface or CLIAffected if Unauthorized or unexpected commands appear in logs or audit records
The environment is affected if the Dell Unity Operating Environment version is 5.4 or any version prior to 5.5.2.0.
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 · scoped5.5.2.0
Apply Dell-provided patches for Unity 5.4 and prior versions as soon as available; restrict local system access to trusted administrators and monitor for anomalous command execution until remediation is complete.
Unity Operating Environment 5.5.2.0
- Identify the current Dell Unity Operating Environment version by accessing the system management interface or running: /nas/bin/nas_admin -version
- Backup all critical data and configuration settings before initiating the upgrade process
- Download Dell Unity Operating Environment version 5.5.2.0 or later from the Dell Support website (support.dell.com)
- Schedule a maintenance window as upgrades may require system downtime
- Apply the upgrade following Dell's official upgrade documentation for the Unity platform
- Verify the upgrade was successful by checking the new version number matches 5.5.2.0 or later
- Validate that the OS Command Injection vulnerability is resolved by confirming the patched version is running
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 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 $4,544.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-43939 — 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-2025-43939 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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