Netscaler zero-day exploited in attacks

A zero-day vulnerability in Netscaler is being exploited in attacks.

Administrators running Netscaler should apply the vendor's security updates.

Published 2026-10-04 22:03:20.890968+00:00 · First seen 2026-10-04 22:03:00.229410+00:00

Corroborating sources

• BleepingComputer · 2026-10-04T21:58:01+00:00 · Independent report
  Shared subjects: CVE-2026-88779, citrix, netscaler · Event: exploitation
• CISA Known Exploited Vulnerabilities Catalog · 2026-10-04T00:00:00+00:00 · Independent report
  Shared subjects: CVE-2026-88779, citrix, netscaler · Event: exploitation

Independent publishers report the same event within 72 hours. Methodology