Critical Authentication Bypass and Buffer Overflow Flaws Patched in NetScaler ADC and Gateway
Cloud Software Group disclosed two critical vulnerabilities affecting NetScaler ADC and NetScaler Gateway products. CVE-2026-19490 permits authentication bypass via an alternate path when the appliances operate as SSL VPN, ICA proxy, CVPN, or RDP proxy gateways, or when configured as authentication, authorization, and auditing virtual servers. CVE-2026-19489 is a buffer overflow in LSN groups with SIP ALG enabled that can lead to unexpected behavior or denial of service. Both issues received CVSS v4.0 base scores of 9.3 and 8.8 respectively. Fixed builds 14.1-73.32 and 13.1-63.21 are now available along with corresponding FIPS and NDcPP updates.
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