Severity - Critical
Description of Problem

A vulnerability has been discovered in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). Refer below for further details.
Affected Versions

The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities:

NetScaler ADC and NetScaler Gateway 14.1 BEFORE 14.1-43.56
NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-58.32
NetScaler ADC 13.1-FIPS and NDcPP  BEFORE 13.1-37.235-FIPS and NDcPP
NetScaler ADC 12.1-FIPS BEFORE 12.1-55.328-FIPS

Details

NetScaler ADC and NetScaler Gateway contain the vulnerabilities mentioned below:
CVE ID Description Pre-conditions CWE CVSSv4
CVE-2025-5349 Improper access control on the NetScaler Management Interface Access to NSIP, Cluster Management IP or local GSLB Site IP CWE-284: Improper Access Control

CVSS v4.0 Base Score: 8.7

(CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L)
CVE-2025-5777 Insufficient input validation leading to memory overread NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server CWE-125: Out-of-bounds Read

CVSS v4.0 Base Score: 9.3

(CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L)

An analysis of CVE-2024-8534, a memory safety vulnerability leading to memory corruption and Denial of Service in NetScaler ADC and Gateway.

Citrix warned admins today to secure all NetScaler ADC and Gateway appliances immediately against ongoing attacks exploiting the CVE-2023-4966 vulnerability.

CVE-2023-4966 affects NetScaler ADC and NetScaler Gateway and, if exploited, could result in unauthorized data disclosure. Learn more.

An unauthenticated RCE flaw (CVE-2022-27518) is being leveraged by APT5 to compromise Citrix ADC deployments.