In brief: Citrix fixes multiple vulnerabilities in Netscaler ADC and Gateway that could allow attackers to bypass login authentication and gain unauthorized access.
Citrix has closed several security vulnerabilities in Netscaler ADC and Netscaler Gateway that, under certain conditions, could allow attackers to bypass authentication and gain unauthorized access.
Citrix has reported multiple vulnerabilities in its Netscaler ADC (Application Delivery Controller) and Netscaler Gateway products. According to the vendor, these vulnerabilities could allow attackers to, among other things, bypass authentication and thereby gain unauthorized access to affected systems. The original report does not provide further technical details on the individual vulnerabilities, affected version levels, or associated CVE identifiers.
Netscaler ADC and Gateway are among the central components of many enterprise networks, as they control access to internal applications and resources in their roles as load balancer, application delivery controller, and VPN gateway. Vulnerabilities that enable an authentication bypass are particularly critical in this context, as they can potentially provide attackers with a direct entry point into protected network segments. Citrix products of this kind have repeatedly been targeted by attacks in the past, including by state-sponsored actors, since they are often exposed at the network edge.
Security teams should review the security advisories provided by Citrix and promptly update the affected Netscaler instances to the patched versions recommended by the vendor. Since details on version numbers and CVE IDs are missing from this report, it is advisable to check directly against the official Citrix security bulletin to verify one’s own patch status and, if necessary, consider compensating measures such as restricting accessibility of the management interface.
Source: www.heise.de · Published August 20, 2026
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