Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since November 3, 2021.
CVE-2019-19781
Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution Vulnerability
Citrix · Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance
Added to KEV November 3, 2021
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2019-19781
- CWE
- CWE-22
- Affected products
- Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance · Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance · Citrix
What happened
Citrix ADC, Citrix Gateway, and multiple Citrix SD-WAN WANOP appliance models contain an unspecified vulnerability that could allow an unauthenticated attacker to perform code execution.
What it means for your business
Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2019-19781). Citrix ADC, Citrix Gateway, and multiple Citrix SD-WAN WANOP appliance models contain an unspecified vulnerability that could allow an unauthenticated attacker to perform code execution. CISA remediation due date: 2022-05-03. If you need help checking exposure, call (864) 335-9223.
Required action
Apply updates per vendor instructions.
CISA due date: May 3, 2022
Sources
Related briefs
Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Citrix NetScaler is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-88779). Citrix NetScaler ADC (formerly Citrix ADC) and Citrix NetScaler Gateway (formerly Citrix Gateway) contain an improper restriction of operations within the bounds of a memory buffer vulnerability that could allow for a denial of service. CISA remediation due date: 2026-10-07. If you need help checking exposure, call (864) 335-9223.
Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Citrix NetScaler is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-88772). Citrix NetScaler ADC and NetScaler Gateway contain an improper restriction of operations within the bounds of a memory buffer vulnerability that could allow for remote code execution or denial of service CISA remediation due date: 2026-09-30. If you need help checking exposure, call (864) 335-9223.
Citrix NetScaler Improper Input Validation Vulnerability
Citrix NetScaler is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-88771). Citrix NetScaler ADC and NetScaler Gateway contain an improper input validation vulnerability that could allow an unauthenticated attacker to execute arbitrary commands. CISA remediation due date: 2026-09-30. If you need help checking exposure, call (864) 335-9223.
Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability
Citrix NetScaler is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-19490). 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. CISA remediation due date: 2026-09-12. If you need help checking exposure, call (864) 335-9223.
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