Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability
CVE-2026-19490 Exploited
Citrix NetScaler ADC and NetScaler Gateway contain an authentication-bypass vulnerability involving an alternate path or channel. When the NetScaler appliance is configured as an AAA virtual server or as a Gateway (SSL VPN, ICA Proxy, CVPN, or RDP Proxy), an unauthenticated remote threat actor may be able to bypass authentication.
Being exploited in the wild
Catalogued 9 September 2026 · US federal remediation deadline 12 September 2026
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for…
Exploit code is also public: Public PoC
- Public PoCTarPeg007/CVE-2026-1949019 stars
- Public PoCBishopFox/CVE-2026-19490-check1 stars
- Public PoCCompleteTech-Security/netscaler-cve-2026-19490-check
Assessment
- CVSS
- Not yet scored
- Severity
- Unscored
- Known exploited
- Yes — listed in the CISA KEV catalog
- Exploit availability
- CISA KEV, Public PoC
- Published
- 9 September 2026
- Last updated
- 9 September 2026
- Affected
- Citrix · NetScaler
- Weakness
- CWE-288
At the source
References
Query this programmatically
Agents can read this through the MCP endpoint, or over HTTP:
curl https://cve.zerocrew.in/api/cve/CVE-2026-19490