NetScaler CVE-2026-88779 is being exploited

CISA catalog addition prompts a fresh update warning for affected ADC and Gateway deployments.

CVE-2026-88779 affects NetScaler ADC and Gateway and is being exploited. CISA added it to its exploited-vulnerability catalog on October 4. CISA says the flaw can cause denial of service. Affected administrators should follow the vendor's updates or mitigations.