Citrix NetScaler Zero-Day Exploited in the Wild Crashes SAML Authentication Services

Executive Summary A high-severity memory overflow vulnerability (CVE-2026-88779, CVSS v4.0 8.7) was disclosed affecting Citrix NetScaler ADC and NetScaler Gateway, allowing attackers to crash the SAML authentication service via crafted network requests. Due to the potential for prolonged service outages blocking VPN and SSO access across entire organizations, immediate patching is required. About CVE-2026-88779 The […]