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The Hacker NewsSep 4, 2026high

Critical NetScaler Flaw Can Bypass Authentication on Certain Gateway and AAA Servers

Citrix patches critical NetScaler Gateway and AAA authentication bypass CVE-2026-19490 (CVSS 9.3) plus a SIP ALG memory overflow flaw; exploitation attempts observed.

Exploited4 min readauthentication-bypass citrix

Stories tagged #exploitation-attempts

Critical NetScaler Flaw Can Bypass Authentication on Certain Gateway and AAA Servers