CVE Watch26 de out. de 2026

CVE-2026-19490

Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability

CVSS

9.8

Crítica

EPSS

32.7%

p98

KEV

SIM

9 de set. de 2026

Exploit Today

0-100

Publicado: 19 de ago. de 2026 · Última mod.: 26 de out. de 2026 · CWE-288

EPSS · 30d

23.2%EPSS · 30 dias32.7%

2026-10-082026-11-05

Ficha do catálogo KEV

Produto

Citrix / NetScaler

Vulnerabilidade

Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability

Adicionado ao KEV

9 de set. de 2026

Corrigir até

12 de set. de 2026

Uso conhecido em ransomware

Não

Descrição resumida

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.

Ação necessária

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.

Notas

https://support.citrix.com/external/article/CTX696939/netscaler-adc-and-netscaler-gateway-secu.html ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-19490

Descrição técnica

Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through 73.32 and from 13.1 through 63.21; Gateway: from 14.1 through 73.32 and from 13.1 through 63.21.

Referências oficiais

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