May 30th, 2023, marks the end-of-life (EOL) for Citrix NetScaler firmware 12.1. EOL refers to the termination of support and updates for Citrix NetScaler 12.1. This means that after the May 30th date, Citrix will no longer provide technical support, security updates, or bug fixes for NetScaler 12.1. Users’ Citrix NetScaler devices will no longer receive critical security updates or technical support, leaving their devices vulnerable to potential security threats and software bugs. This can result in reduced system performance, reliability, and compatibility issues with newer software and hardware.