What’s Vulnerable › Vulnerabilities

CVE-2021-22891

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-27 · updated 2026-06-17
• Weakness: CWE-862

Description

A missing authorization vulnerability exists in Citrix ShareFile Storage Zones Controller before 5.7.3, 5.8.3, 5.9.3, 5.10.1 and 5.11.18 may allow unauthenticated remote compromise of the Storage Zones Controller.

Affected products

• Citrix ShareFile Storage Zones Controller: from 5.7 before 5.7.3; from 5.8 through 5.8.3; from 5.9 before 5.9.3; from 5.10 before 5.10.1; from 5.11 before 5.11.18 — fixed in 5.7.3, 5.9.3, 5.10.1, 5.11.18
• Citrix ShareFile Storage Zones Controller: 5.7.3, 5.8.3, 5.9.3, 5.10.1, 5.11.18

How to fix

Upgrade to a fixed version: Citrix ShareFile Storage Zones Controller 5.7.3, 5.9.3, 5.10.1, 5.11.18. Check the vendor advisory for mitigations.

References

• https://support.citrix.com/article/CTX310780
• https://support.citrix.com/article/CTX310780

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