CRITICAL ALERT: Critical vulnerabilities in Citrix NetScaler Application Delivery Controller (ADC) and Citrix NetScaler Gateway products
ID: 1bfef37e-1982-5b65-9d1d-ddcb97e0fa3b
STIX ID: report--1bfef37e-1982-5b65-9d1d-ddcb97e0fa3b
Feed Name: Australian Cyber Security Centre (Alerts)
Date Published: 2026-09-04
Date Updated: 2026-10-13
Author: Australian Cyber Security Centre (ACSC)
The Australian Cyber Security Centre warns of two Citrix NetScaler ADC/Gateway vulnerabilities (CVE-2026-19489 memory overflow tied to SIP ALG on LSN groups and CVE-2026-19490 authentication bypass related to SAML or VPN gateway configurations), urges organisations to apply patches released 19 August 2026, review configurations, and monitor for suspicious activity, and offers contact information for assistance.
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