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Vulnerabilities

Vulnerability · CVE-2021-22941

Citrix ShareFile Improper Access Control Vulnerability

Published Sep 23, 2021 · catalog updated Jun 16, 2026 · Citrix ShareFile

Patch now

CVE-2021-22941 is in the CISA known-exploited catalog, due Apr 15, 2022. Confirm Citrix ShareFile against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
53.59%
Remediation
Remediation guidance
Affected products
cpe citrix/sharefile storagezones controller · vendor Citrix ShareFile

Improper Access Control in Citrix ShareFile storage zones controller may allow an unauthenticated attacker to remotely compromise the storage zones controller. Initial-access exploit intelligence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe citrix/sharefile storagezones controllerversion unspecified
  • vendor Citrix ShareFileversion unspecified

How to fix CVE-2021-22941

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-22941 is in the CISA known-exploited catalog, due Apr 15, 2022. Confirm Citrix ShareFile against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply updates per vendor instructions.

What should an analyst verify?

CWE-284: Improper Access Control. EPSS 53.59%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 23, 2021 · Catalog

    Detected

    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.

  2. Mar 25, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Apr 15, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2021-22941

    Improper Access Control in Citrix ShareFile storage zones controller may allow an unauthenticated attacker to remotely compromise the storage zones controller.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-22941

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-22941

    30-day exploitation probability 53.6%

    first.org
  • NIST NVDVulnerability recordCVE-2021-22941

    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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2021-22941

    Improper Access Control in Citrix ShareFile storage zones controller may allow an unauthenticated attacker to remotely compromise the storage zones controller.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.