In December 2019, Citrix announced that their flagship product, Citrix Application Delivery Controller (ADC) and Gateway, had a vulnerability that would allow code execution to take place on affected devices without any authentication. This vulnerability (designated CVE-2019-19781) was severe - on a scale of 1 to 10 it was deemed a 9.8 meaning that an attacker able to exploit this vulnerability could do serious damage.

Last updated: 20th January, 9.45am. A critical Citrix vulnerability (CVE-2019-19781) is currently under mass exploitation. To detect if your organisation is compromised, Redscan has developed a script that will examine your host.