CVE-2021-22941

Q: How do I fix CVE-2021-22941?

Upgrade sharefile storagezones controller to 5.11.20 or later.

Q: Is CVE-2021-22941 being actively exploited?

Yes. CVE-2021-22941 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. CISA has also linked it to known ransomware campaigns. US federal agencies were required to remediate it by 2022-04-15. Treat it as a priority whatever its CVSS score says.

Q: How severe is CVE-2021-22941?

CVE-2021-22941 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2021-22941 affect?

Published advisories record a fix for sharefile storagezones controller (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

CRITICALCISA KEVEPSS 99th pctl

9.8

CVSS v3

NVD

Description

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.

CWE-284Improper Access Control

How to fix

Remediation Available

sharefile storagezones controllerNVD

Affected:< 5.11.20Fixed in:5.11.20CVE-2021-22941derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

53.59%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Citrix ShareFile Improper Access Control Vulnerability

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

Apply updates per vendor instructions.

Remediation due: 2022-04-15

Associated with ransomware campaigns

References

Vendor Advisory1

support.citrix.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-284 (Improper Access Control) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-27350	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2019-1653	High	7.5	100%	KEV	-
CVE-2023-23752	Medium	5.3	100%	KEV	Fix
CVE-2023-38205	High	7.5	100%	KEV	-
CVE-2023-29298	High	7.5	100%	KEV	-
CVE-2024-27348	Critical	9.8	99%	KEV	Fix

Common questions

How do I fix CVE-2021-22941?

Upgrade sharefile storagezones controller to 5.11.20 or later.

Is CVE-2021-22941 being actively exploited?

Yes. CVE-2021-22941 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. CISA has also linked it to known ransomware campaigns. US federal agencies were required to remediate it by 2022-04-15. Treat it as a priority whatever its CVSS score says.

How severe is CVE-2021-22941?

CVE-2021-22941 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2021-22941 affect?

Published advisories record a fix for sharefile storagezones controller (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.