Citrix today is alerting customers of a critical-severity vulnerability (CVE-2023-3519) in NetScaler ADC and NetScaler Gateway that already has exploits in the wild, and “strongly urges” to install updated versions without delay.
The security issue may be the same one advertised earlier this month on a hacker forum as a zero-day vulnerability.
https://www.bleepingcomputer.com/news/s ... -zero-day/