Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability
What it means
CISA Known Exploited Vulnerabilities ha pubblicato CVE-2026-19490 relativa a Citrix NetScaler. La vulnerabilita risulta gia sfruttata: la verifica di esposizione e prioritaria.
Why it matters
La fonte segnala sfruttamento attivo. La priorita dipende dalla presenza della tecnologia interessata nel perimetro; il testo acquisito non consente di dedurre ulteriori impatti tecnici.
Recommended actions
- Verificare immediatamente esposizione, versioni e indicatori di compromissione.
- 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 evaluating each asset's intern
- Confermare l'applicabilita consultando la fonte ufficiale e l'inventario asset.
- Pianificare mitigazione o aggiornamento secondo criticita e rischio di interruzione.
Translation in progress
The official content is available in the original language. The Italian version will be published once automated checks are complete.
Text acquired from the source
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.
- Source
- CISA Known Exploited Vulnerabilities
- Publishing entity
- CISA
- Entity type
- National authority
- Area
- North America · US
- Original language
- en · translation in preparation
- Publication
- 09/09/2026 02:00
- CVE
- CVE-2026-19490
- Classification
- exploited
- Vendor
- Citrix
- Product
- NetScaler
- Stated country
- US
Affected products and versions
| Product | Affected release or range | Fix or verification required | Source |
|---|---|---|---|
| NetScalerADC | da 14.1, inclusa; fino a 73.32, inclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | CVE Record - NetScaler |
| NetScalerADC | da 13.1, inclusa; fino a 63.21, inclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | CVE Record - NetScaler |
| NetScalerGateway | da 14.1, inclusa; fino a 73.32, inclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | CVE Record - NetScaler |
| NetScalerGateway | da 13.1, inclusa; fino a 63.21, inclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | CVE Record - NetScaler |
| citrixnetscaler application delivery controller | da 13.1, inclusa; prima di 13.1-37.277, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| citrixnetscaler application delivery controller | da 13.1, inclusa; prima di 13.1-37.277, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| citrixnetscaler application delivery controller | da 13.1, inclusa; prima di 13.1-63.21, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| citrixnetscaler application delivery controller | da 14.1, inclusa; prima di 14.1-73.32, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| citrixnetscaler application delivery controller | da 14.1-66.68, inclusa; fino a 14.1-73.32, inclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| citrixnetscaler gateway | da 13.1, inclusa; prima di 13.1-63.21, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
| citrixnetscaler gateway | da 14.1, inclusa; prima di 14.1-73.32, esclusa | Verificare remediation e aggiornamenti nell'advisory del vendor | NIST NVD |
Action indicated by the source
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 evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.