CVE-2021-22941 (GCVE-0-2021-22941)

Vulnerability from cvelistv5 – Published: 2021-09-23 12:44 – Updated: 2025-10-21 23:25
VLAI CISA KEV KEVintel KEV
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-284 - Improper Access Control - Generic (CWE-284)
Assigner
References
Impacted products
Vendor Product Version
n/a Citrix ShareFile storage zones controller Affected: 5.11.20
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 82db75b3-6cd5-42d5-8225-9acacda3d549

Vulnerability ID: CVE-2021-22941

Status: Confirmed

Status Updated: 2022-03-25 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2022-03-25
Asserted: 2022-03-25
Scope
Notes: KEV entry: Citrix ShareFile Improper Access Control Vulnerability | Affected: Citrix / ShareFile | Description: Improper Access Control in Citrix ShareFile storage zones controller may allow an unauthenticated attacker to remotely compromise the storage zones controller. | Required action: Apply updates per vendor instructions. | Due date: 2022-04-15 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-22941
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-284
Feed CISA Known Exploited Vulnerabilities Catalog
Product ShareFile
Due Date 2022-04-15
Date Added 2022-03-25
Vendorproject Citrix
Vulnerabilityname Citrix ShareFile Improper Access Control Vulnerability
Knownransomwarecampaignuse Known
References
Created: 2026-02-02 12:27 UTC | Updated: 2026-02-06 07:17 UTC
KEVintel KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 397d90bc-fe56-41a3-b575-7ed08b8d68c3

Vulnerability ID: CVE-2021-22941

Status: Confirmed

Status Updated: 2022-03-25 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2022-03-25
Asserted: 2022-03-25
Scope
Notes: KEVIntel entry: Improper Access Control in Citrix ShareFile storage zones controller before 5.11.20 may allow an unauthenticated attacker to remotely compromise... | Affected: Citrix / Citrix ShareFile storage zones controller | CVSS: 9.8 (CRITICAL) | Used in malware: yes | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Confirmed Compromise

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Improper Access Control in Citrix ShareFile storage zones controller before 5.11.20 may allow an unauthenticated attacker to remotely compromise...
Vendor Citrix
Product Citrix ShareFile storage zones controller
Added Date 2022-03-25T00:00:00.000Z
Cvss Score 9.8
Epss Score None
Cvss Severity CRITICAL
Epss Percentile None
Used In Malware yes
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-19 12:47 UTC | Updated: 2026-06-19 12:47 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.