Citrix has released security patches addressing four vulnerabilities across NetScaler ADC, NetScaler Gateway, Secure Access Client, and the Citrix Workspace app. The most critical issue, CVE-2025-5777 (CVSS 9.3), affects NetScaler configurations used as Gateway or AAA virtual servers and could lead to out-of-bounds memory reads due to insufficient input validation. Users are strongly urged to upgrade to supported versions immediately, as older versions like 12.1 and 13.0 remain vulnerable and unsupported.