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Citrix ADC, Citrix Gateway, and Citrix SD-WAN WANOP Edition – Unauthenticated Denial of Service

November 9, 2021

Severity: Critical

Issue / Vulnerability

Unauthenticated denial of service and temporary disruption of services.

Citrix has published a discovered vulnerability on Citrix ADC, Citrix Gateway and Citrix SD-WAN WANOP Edition devices that could result in possible unauthenticated denial of service or temporary disruption of the management GUI (Graphical User Interface), certain APIs and RPC communication.

Citrix has released firmware addressing the vulnerabilities and recommends installing them as soon as possible.

Who Is Affected?

Applies to customer-managed Citrix ADC, Citrix Gateway and Citrix SD-WAN WANOP Edition appliances.

Remediation / Action Plan

While no known exploits are currently available, to reduce risk, Citrix strongly encourages you to apply the fixes as soon as possible.

Apply mitigation steps stated in this article:

Please contact Cornerstone.IT if you require assistance.