An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway before 10.5 build 70.8, 11.x before 11.1 build 63.9, 12.0 before build 62.10, 12.1 before build 54.16, and 13.0 before build 41.28. An attacker with management-interface access can bypass authentication to obtain appliance administrative access. These products formerly used the NetScaler brand name.

The AppFirewall functionality in Citrix NetScaler Application Delivery Controller and NetScaler Gateway 10.5 before Build 68.7, 11.0 before Build 71.24, 11.1 before Build 58.13, and 12.0 before Build 57.24 allows remote attackers to execute arbitrary code via unspecified vectors.

Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway 10.5 before build 67.13, 11.0 before build 71.22, 11.1 before build 56.19, and 12.0 before build 53.22 allow remote attackers to obtain sensitive information from the backend client TLS handshake by leveraging use of TLS with Client Certificates and a Diffie-Hellman Ephemeral (DHE) key exchange.

Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway 10.5 before build 67.13, 11.0 before build 71.22, 11.1 before build 56.19, and 12.0 before build 53.22 might allow remote attackers to decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, aka a ROBOT attack.

A vulnerability has been identified in the management interface of Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway 10.1 before build 135.18, 10.5 before build 66.9, 10.5e before build 60.7010.e, 11.0 before build 70.16, 11.1 before build 55.13, and 12.0 before build 53.13 (except for build 41.24) that, if exploited, could allow an attacker with access to the NetScaler management interface to gain administrative access to the appliance.