CVE-2021-22941 kev+ ransomware in the critical feed json
Improper Access Control in Citrix ShareFile storage zones controller before 5.11.20 may allow an unauthenticated attacker to remotely compr…
published 2021-09-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10070
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Exploited
- added 2022-03-25, used in ransomware
- epss
- 53.6%
- EPSS 53.6% chance of exploitation in 30 days, percentile 99%
- public exploits
- 0
- none known
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.
Patch / fix
cisa required action Apply updates per vendor instructions.
- citrix sharefile_storagezones_controller 5.11.20
Timeline
- Published
- Added to CISA KEV
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 4 y ago
- Patch by
- 2022-04-15 (4 y ago)
- Ransomware
- Known to be used in ransomware campaigns
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Citrix, ShareFile
- CISA name
- Citrix ShareFile Improper Access Control Vulnerability
Ransomware
Groups reported to have exploited it in intrusions.
- Prophet Spider initial access broker
reported by crowdstrike.com
Ransomware Vulnerability Matrix by BushidoUK (github.com/BushidoUK/Ransomware-Vulnerability-Matrix), reformatted per CVE. CC BY 4.0
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- yes
- Technical impact
- total
- Assessed
- 21 mo ago
Exploit prediction
53.59% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Affected products
- n/a Citrix ShareFile storage zones controller
Classification
- Weakness
-
- CWE-284 Improper Access Control
- Technology feeds
References
-
support.citrix.com
/article/CTX328123
broken-link, vendor-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22941
government-resource, us-government-resource
Sources
- CVE List CVE-2021-22941
- NVD CVE-2021-22941
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.