Affects Citrix NetScaler ADC/Gateway — widely deployed enterprise network appliances; a critical RCE here would disrupt many organizations.
CVE-2026-19490
Critical remote-code-execution vulnerability in Citrix NetScaler ADC/Gateway.
Is CVE-2026-19490 being exploited?
Yes. CVE-2026-19490 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2026-19490?
CVE-2026-19490 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-19490?
Yes. A fix has been recorded for CVE-2026-19490. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-19490 affect?
CVE-2026-19490 affects Citrix NetScaler ADC (v13.1–63.21, v14.1–73.32), Citrix NetScaler Gateway (v13.1–63.21, v14.1–73.32). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-19490?
Isolate appliances, restrict management access, apply vendor mitigations and deploy patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution leading to full system compromise, data exfiltration, and lateral movement into internal networks.
Immediate action required
- affected>= 14.1 and <= 73.32
- affected>= 13.1 and <= 63.21
- affected>= 14.1 and <= 73.32
- affected>= 13.1 and <= 63.21
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.