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Actively exploited in the wild. This CVE is on the CISA Known Exploited Vulnerabilities list — treat remediation as urgent. Federal remediation due by 15 Apr 2022. Known ransomware use
Sharefile Storagezones ControllerApplication · Citrix

CVE-2021-22941

CRITICAL · 9.8 CVSS v3.1 Published 2021-09-23
Fix available
A fix is available. Upgrade to 5.11.20 or later.
See remediation →
100/100
Remediation priority · Urgent
In the wild Ransomware High EPSS Remotely reachable No privileges 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
Improper Access Control in Citrix ShareFile storage zones controller before 5.11.20 may allow an unauthenticated attacker to remotely compromise the storage zones controller.

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

Improper Access Control vulnerability in Citrix ShareFile storage zones controller versions before 5.11.20 allows unauthenticated remote attackers to compromise the storage zones controller due to missing or inadequate authentication checks on specific endpoints or functions.

MitigationUpdate Citrix ShareFile storage zones controller to version 5.11.20 or later, or apply vendor-supplied security patches immediately to remediate the unauthenticated access vector.

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
Sharefile Storagezones ControllerApplication
Affected:< 5.11.20

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
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 checks

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

  1. Confirm Citrix ShareFile Storage Zones Controller is installed
    Check running services or installed programs for 'ShareFile' or 'Storage Zones Controller' components on the server
    Affected if The software is present on the system
  2. Identify the installed version
    Locate the version information for the Storage Zones Controller installation, typically found in the application itself, control panel, or installation directory
    Affected if Version cannot be determined or is lower than 5.11.20
  3. Compare against affected version range
    Verify if the installed version is any version before 5.11.20 (e.g., 5.11.x versions below 5.11.20, 5.10.x, earlier versions)
    Affected if Installed version is less than 5.11.20
  4. Check if the management interface is network-accessible
    Determine if the ShareFile Storage Zones Controller web interface is exposed to network access, especially untrusted networks
    Affected if The interface is externally accessible and the version is below 5.11.20

You are affected if Citrix ShareFile Storage Zones Controller is installed and the running version is lower than 5.11.20, particularly if the management interface is network-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.

dbcve · scoped
Upgrade available Upgrade to 5.11.20 or later
Fixed in 5.11.20
Interim mitigation

Update Citrix ShareFile storage zones controller to version 5.11.20 or later, or apply vendor-supplied security patches immediately to remediate the unauthenticated access vector.

Recommended fix High confidence

Citrix ShareFile Storage Zones Controller 5.11.20 or later

  1. 1. Back up the current Storage Zones Controller configuration and data
  2. 2. Download the Citrix ShareFile Storage Zones Controller version 5.11.20 or later from the official Citrix support portal
  3. 3. Follow Citrix's documented upgrade procedure for Storage Zones Controller
  4. 4. Verify the upgrade was successful by checking the controller version in the admin interface
  5. 5. Confirm the vulnerability is remediated by testing that unauthenticated access is properly denied

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

Fix this in Sharefile Storagezones Controller Exploited in the wild — priority engagement
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,080
Get it fixed fast

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,328.

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-2021-22941 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