New NetScaler Zero-Day Exploited in Targeted Attacks Can Knock SAML Deployments Offline

The Hacker News · Monday, 5 October 2026 at 06:40 (2h ago) · Original article ↗

Citrix has released security updates for a high-severity security flaw in NetScaler ADC and Citrix NetScaler Gateway that has been exploited as part of targeted zero-day attacks.

The vulnerability, tracked as CVE-2026-88779, carries a CVSS score of 8.7 out of 10.0.

"CVE-2026-88779 is a memory overflow vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway that can lead to

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New NetScaler Zero-Day Exploited in Targeted Attacks Can Knock SAML Deployments Offline

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