Exploitation of vulnerabilities affecting Citrix NetScaler ADC and Citrix NetScaler Gateway

The UK NCSC warns that two vulnerabilities affecting Citrix NetScaler ADC and Citrix NetScaler Gateway are being actively exploited. UK organisations should urgently identify exposed appliances, apply vendor mitigations or patches, review access and authentication controls, and investigate for signs of compromise. The wider feed also covers state-sponsored activity, malware, internet-exposed systems, and defensive guidance, but the actively exploited Citrix issue is the primary security event.