CVE-2021-36287
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 VNX2 for file version 8.1.21.266 and earlier, contain an unauthenticated remote code execution vulnerability which may lead unauthenticated users to execute commands on the system.
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 confidenceUnauthenticated remote code execution vulnerability in Dell VNX2 for file versions 8.1.21.266 and earlier allows attackers to execute arbitrary commands on the system without any credentials. The critical severity (CVSS 9.8) indicates the flaw is network-exploitable and can lead to complete system compromise.
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<= 8.1.21.266CVSS 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:3.1/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 the installed Dell EMC Unity Operating Environment versionAccess the system via CLI or management interface and retrieve the version number. On the Unity system, you can typically use the 'unisphere' CLI or check through the Unisphere web interface under System > Settings > About. Look for the precise version string such as '8.1.21.266' or earlier.Affected if The displayed version number is 8.1.21.266 or any version lower (for example, 8.1.20.x, 8.1.10.x, etc.)
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Confirm the product is Dell VNX2 for file or Unity OEVerify that the system is specifically a Dell VNX2 for file appliance or running Dell EMC Unity Operating Environment. Check the system name, model, or product documentation accessible through the management interface.Affected if The product is identified as Dell VNX2 for file or Dell EMC Unity Operating Environment running the vulnerable version identified in step 1
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Assess network exposure of the management interfacesReview firewall rules, network segmentation, and access control lists to determine if the Unisphere management interface (typically ports 443, 8443) or SSH (port 22) is reachable from untrusted or external networks. Check routing tables and perimeter device configurations.Affected if The management interfaces are exposed directly to the internet or to untrusted internal network segments without proper access restrictions
You are affected if your system runs Dell EMC Unity Operating Environment version 8.1.21.266 or earlier and has its management interface accessible from a network where untrusted actors could reach it.
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 dataUpgrade Dell VNX2 for file to a version newer than 8.1.21.266, or if no patch is available, isolate the system from untrusted networks and implement additional access controls as a temporary measure.
- 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-2021-36287 — 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-2021-36287 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
- No spam, self-promotion, credentials, or personal data