CVE-2019-18177

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-26 · updated 2026-06-17
Weakness: CWE-200

Description

In certain Citrix products, information disclosure can be achieved by an authenticated VPN user when there is a configured SSL VPN endpoint. This affects Citrix ADC and Citrix Gateway 13.0-58.30 and later releases before the CTX276688 update.

Affected products

Citrix Application Delivery Controller Firmware: before 13.0-58.30 — fixed in 13.0-58.30
NetScaler Gateway: before 13.0-58.30 — fixed in 13.0-58.30

How to fix

Upgrade to a fixed version: Citrix Application Delivery Controller Firmware 13.0-58.30; NetScaler Gateway 13.0-58.30. Check the vendor advisory for mitigations.

References

https://support.citrix.com/article/CTX276688/citrix-application-delivery-controller-citrix-gateway-and-citrix-sdwan-wanop-appliance-security-update
https://support.citrix.com/article/CTX276688/citrix-application-delivery-controller-citrix-gateway-and-citrix-sdwan-wanop-appliance-security-update

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