10

CVE-2021-22941: Citrix ShareFile Improper Access Control Vulnerability

CVSS: 10.0v2.0HighKEVRansomwareAnalyzed
Published 23-09-2021Last modified 21-10-2025
Open JSON

Vulnerability summary

CVE-2021-22941 is a high (CVSS 10.0) Improper Access Control vulnerability in Citrix ShareFile. It is known to be exploited: CISA lists it, first on 25-03-2022. It has been used in ransomware campaigns. EPSS estimates a 53.59% chance of exploitation in the next 30 days, higher than 98.9% of scored vulnerabilities.

Overall risk
90/100
0100
Critical · default modelHow is this calculated?
CVSS score
10.0/10
010
High · v2.0 (NVD)
EPSS score
53.59%
0%100%
Critical · 0.00 pp in 30 days
KEVListedCISA
RansomwareKnown useFlagged by CISA
Public exploits0No public exploits recorded

Timeline

  1. 23-09-2021
    PublishedVulnerability first disclosed.
  2. 25-03-2022
    Added to CISA KEVCitrix ShareFile Improper Access Control Vulnerability
  3. 15-04-2022
    CISA remediation dueApply updates per vendor instructions.
  4. 21-10-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

53.59%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

0.00 pp

From 53.59% on 19-09-2026

19-09-202619-10-2026
EPSS score
53.59%

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
25-03-2022
Federal due date
15-04-2022
Ransomware

CISA required action

Apply updates per vendor instructions. nvd.nist.gov/vuln/detail/CVE-2021-22941

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Citrix1 product

1 vendor · 1 product

References

2 links