Citrix over the last six days has been releasing firmware updates to fix CVE-2019-19781, a critical remote code execution vulnerability in its Citrix Application Delivery Controller, Citrix Gateway and SD-WAN WANOP products, which cybercriminals have actively exploited in an attempt to deliver ransomware, backdoors and coin miners.

The Fort Lauderdale, Fla.-based software company has now patched versions 11.1, 12.0, 12.1 and 13.0 of Citrix ADC and Citrix Gateway (formerly branded as NetScaler ADC and NetScaler Gateway), and expects to issue a fix for version 10.5 today.

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