New Citrix NetScaler Zero-Day Vulnerability Actively Exploited

Citrix has confirmed a new high-severity memory overflow vulnerability (CVE-2026-88779) affecting its NetScaler ADC and Gateway products. This zero-day flaw is currently being actively exploited in targeted attacks, leading to denial-of-service conditions for affected systems. This incident follows closely after other recently patched zero-day vulnerabilities in Citrix products, highlighting ongoing security challenges.