dbcve.org
Hybrid ClientApplication · Dell

CVE-2021-21536

MEDIUM · 5.5 CVSS v3.1 Published 2021-04-30
Fix available
A fix is available. Upgrade to 1.5 or later.
See remediation →
57/100
Remediation priority · Elevated
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 Hybrid Client versions prior to 1.5 contain an information exposure vulnerability. A local unauthenticated attacker may exploit this vulnerability in order to register the client to a server in order to view sensitive information.

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 confidence

Dell Hybrid Client versions prior to 1.5 contain an information exposure vulnerability in the client registration mechanism. A local unauthenticated attacker can exploit this to register the client to an arbitrary server, allowing them to view sensitive information that should be protected.

MitigationUpgrade to Dell Hybrid Client version 1.5 or later, which contains the fix for this vulnerability. If upgrading is not immediately possible, restrict physical and local access to systems running the vulnerable client.

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
Hybrid ClientApplication
Affected:< 1.5

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
None
Availability
None

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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. Identify if Dell Hybrid Client is installed
    Look for Dell Hybrid Client in installed programs (Windows: Programs and Features, Linux: package manager) or check common installation directories
    Affected if Dell Hybrid Client is present on the system
  2. Determine the installed version of Dell Hybrid Client
    Open the Dell Hybrid Client application and navigate to About/Version information, or check the Windows registry or Linux package details for the exact version number
    Affected if The version shown is below 1.5 (for example, 1.4.x, 1.3.x, etc.)
  3. Verify the client registration mechanism configuration
    Check the client settings or configuration panel for registration/server connection settings - look for any server registration or client enrollment options
    Affected if The registration feature is present and configurable by local users without authentication

A system is affected if Dell Hybrid Client version 1.5 or later is NOT installed, and the client registration feature allowing server configuration is accessible

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.

From vendor data
Upgrade available Upgrade to 1.5 or later
Fixed in 1.5
Interim mitigation

Upgrade to Dell Hybrid Client version 1.5 or later, which contains the fix for this vulnerability. If upgrading is not immediately possible, restrict physical and local access to systems running the vulnerable client.

Fix this in Hybrid Client Scoped from the published advisory
  • Consultation4.0 h
  • Implementation12.0 h
  • Testing6.0 h
  • Review / QA4.0 h
26.0 hours of engineering $4,580
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,328.

Scan for this in your stack

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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-2021-21536 in production — separate from our analysis above.

No notes yet

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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