Citrix warns of newly exploited NetScaler ADC and Gateway zero-day flaw (CVE-2026-88779)

Citrix has issued security updates for a high-severity memory overflow vulnerability (CVE-2026-88779) in NetScaler ADC and NetScaler Gateway, which is being actively exploited in targeted zero-day attacks. The flaw can lead to denial-of-service under specific deployment conditions for customer-managed NetScaler deployments.