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HIGH · 7.5

CVE-2021-22955

A unauthenticated denial of service vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 and 11.1-65.23 when configured as a VPN (Gateway) or AAA virtual server could allow an attacker to cause...

Vulnerability Description

A unauthenticated denial of service vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 and 11.1-65.23 when configured as a VPN (Gateway) or AAA virtual server could allow an attacker to cause a temporary disruption of the Management GUI, Nitro API, and RPC communication.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
CitrixApplication Delivery Controller Firmware<= 11.1-65.23
CitrixApplication Delivery Controller-
CitrixGateway< 11.1-65.23

Related Weaknesses (CWE)

CWE-400

References

FAQ

What is CVE-2021-22955?

CVE-2021-22955 is a vulnerability with a CVSS score of 7.5 (HIGH). A unauthenticated denial of service vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 and 11.1-65.23 when configured as a VPN (Gateway) or AAA virtual server could allow an attacker to cause...

How severe is CVE-2021-22955?

CVE-2021-22955 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-22955?

Check the references section above for vendor advisories and patch information. Affected products include: Citrix Application Delivery Controller Firmware, Citrix Application Delivery Controller, Citrix Gateway.