CVE-2026-88771: Inside the Exploitation of a Critical NetScaler RCE Vulnerability

CVE-2026-88771: Citrix security flaw - update now.

On September 27 2026 Citrix disclosed it with a CVSS v3.1 score of 9.8 allowing unauthenticated attackers to execute arbitrary commands on NetScaler ADC and Gateway appliances. CISA added the flaw to its Known Exploited Vulnerabilities catalog after worldwide active exploitation reports.

Sources

• Zscaler ThreatLabz

Story so far

1. 2026-10-16 CVE-2026-88771: Inside the Exploitation of a Critical NetScaler RCE Vulnerability – Zscaler ThreatLabz
   first report, added to CISA KEV, exploited in attacks

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#Citrix#Vulnerability#Cybersecurity