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Unity Operating EnvironmentApplication · Dell

CVE-2025-36606

HIGH · 7.8 CVSS v3.1 Published 2025-08-04
Fix available
A fix is available. Upgrade to 5.5.1.0 or later.
See remediation →
80/100
Remediation priority · High
Zero-click

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 · unedited
Dell Unity, version(s) 5.5 and prior, contain(s) an OS Command Injection Vulnerability in its svc_nfssupport utility. An authenticated attacker could potentially exploit this vulnerability, escaping the restricted shell and execute arbitrary operating system commands with root 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 confidence

Dell Unity storage systems versions 5.5 and prior contain an OS command injection vulnerability in the svc_nfssupport utility. An authenticated attacker can exploit this to escape the restricted shell and execute arbitrary operating system commands with root privileges.

MitigationApply the vendor-supplied patch or upgrade Dell Unity to a version newer than 5.5. Until patched, limit network access to trusted authenticated users only.

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
Unity Operating EnvironmentApplication
Affected:< 5.5.1.0

CVSS 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 checks

Work through these to decide whether this CVE applies to you.

  1. Check the Dell Unity Operating Environment version
    Access the Unisphere web interface and navigate to Settings > Support > System Information, or use the CLI command 'system version' to retrieve the installed OE version
    Affected if The version is 5.5.x or prior, or any version below 5.5.1.0
  2. Verify if the svc_nfssupport utility is accessible
    Log into the Dell Unity CLI or Unisphere and check if the NFS support service module is present and accessible to authenticated users
    Affected if The svc_nfssupport utility exists and is accessible to the authenticated user account being used
  3. Confirm NFS service is enabled
    Check the NFS service configuration status in Unisphere under Storage > File Shares or via CLI with 'service -s' to see if NFS is provisioned
    Affected if NFS is enabled or configured on the system, which would expose the svc_nfssupport utility
  4. Check authentication and access controls
    Review user accounts with access to the svc_nfssupport utility and verify which authenticated users have sufficient privileges to invoke the vulnerable command path
    Affected if An authenticated user with access to the svc_nfssupport utility exists on the system

A system is affected if it runs Dell Unity OE version below 5.5.1.0 and has an authenticated user who can access the svc_nfssupport utility with NFS enabled.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 5.5.1.0 or later
Fixed in 5.5.1.0
Interim mitigation

Apply the vendor-supplied patch or upgrade Dell Unity to a version newer than 5.5. Until patched, limit network access to trusted authenticated users only.

Recommended fix Moderate confidence

Unity Operating Environment 5.5.1.0 or later

  1. 1. Back up all critical data and configuration settings on the Dell Unity array.
  2. 2. Review Dell Unity Operating Environment upgrade documentation and release notes for version 5.5.1.0.
  3. 3. Schedule a maintenance window as upgrades may require brief system downtime.
  4. 4. Download the Unity OE 5.5.1.0 (or later) update package from Dell support portal (support.dell.com).
  5. 5. Apply the upgrade following Dell's documented procedure for the svc_nfssupport component update.
  6. 6. After upgrade, verify the system is running version 5.5.1.0 or later.
  7. 7. Confirm the svc_nfssupport utility is no longer vulnerable to command injection.
Caveat Review Dell release notes for any configuration or compatibility changes in OE 5.5.1.0 before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Unity Operating Environment Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing8.0 h
  • Review / QA4.0 h
24.0 hours of engineering $4,160
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-36606 in production — separate from our analysis above.

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What this is

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.

What belongs here
  • 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