Citrix Patches Six Critical Vulnerabilities in NetScaler ADC and Gateway

Citrix released security updates on Tuesday to address six vulnerabilities in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). These flaws could allow attackers to perform arbitrary file reads or trigger denial-of-service (DoS) conditions. One of the vulnerabilities, tracked as CVE-2026-8451, has a CVSS score of 8.8 and stems from insufficient input validation. The updates specifically target these security issues in the affected NetScaler products. No additional technical details about the other five vulnerabilities were provided in the notice.