CVE-2019-12991: Citrix SD-WAN and NetScaler Command Injection Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2022-03-25. EPSS: 74.1% chance of exploitation in the next 30 days.

Citrix SD-WAN 10.2.x before 10.2.3 and NetScaler SD-WAN 10.0.x before 10.0.8 have Improper Input Validation (issue 5 of 6).

Affected products

• Citrix NetScaler SD-WAN: from 10.0.0, before 10.0.8 (fixed in 10.0.8)
• Citrix SD-WAN: from 10.2.0, before 10.2.3 (fixed in 10.2.3)

Published 2019-07-16. Last modified 2026-06-17.