Australian Cyber Security Centre Updates Critical Alert for Citrix NetScaler with New Vulnerability CVE-2026-107406

The Australian Signals Directorate's Australian Cyber Security Centre (ACSC) has updated its critical alert for Citrix NetScaler ADC and NetScaler Gateway devices to include a newly discovered vulnerability, CVE-2026-107406. This critical flaw impacts devices configured as SAML SP or IdP, prompting Citrix to urge customers to update to the latest versions to prevent compromise.