NetScaler vulnerabilities
We track 19 vulnerabilities in NetScaler products across 7 products. 19 are rated high or critical, and 7 have been exploited in real attacks. The most recent was published on October 8, 2026.
Latest NetScaler vulnerabilities
- 9.5 Critical severity
ADC: Improper Restriction of Operations within the Bounds of a Memory Buffer
Memory overflow vulnerability leading to Remote Code Execution or Denial of Service Vulnerability in NetScaler ADC. NetScaler ADC or NetScaler Gateway must be configured as a SAML SP or SAML IdP, subject to the following version-specific requirements: * For th
- 7.5 High severity
Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Exploited
Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before 14.1-73.41 and before 13.1-64.28.
- 9.8 Critical severity
Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Exploited
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.
- 8.8 High severity
ADC: Buffer Copy without Checking Size of Input
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.
- 9.8 Critical severity
ADC: Improper Restriction of Operations within the Bounds of a Memory Buffer
Multiple Memory overflow vulnerabilities in NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if NetScaler ADC is configured as an LB of type Oracle OR NetScaler ADC is configured as a DNS Proxy OR NetScal
- 9.8 Critical severity
Citrix NetScaler ADC and NetScaler Gateway Improper Restriction of Operations within the Bounds of a Memory Buffer Exploited
Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if the appliance is configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server
- 7.5 High severity
ADC: Out-of-bounds Read
Insufficient input validation in NetScaler ADC and NetScaler Gateway leading to memory overread if NetScaler ADC or NetScaler Gateway is configured as a SAML IDP
- 7.5 High severity
ADC: Missing Release of Memory after Effective Lifetime
Denial of service via malformed HTTP/2 requests in NetScaler ADC and NetScaler Gateway if HTTP/2 is enabled in HTTP Profile and associated with the virtual server (of type LB, CS, VPN) or the service configured on NetScaler
- 7.5 High severity
ADC: Out-of-bounds Read
Insufficient input validation leading to memory overread in NetScaler ADC and NetScaler Gateway if the TCP TimeStamp is enabled in TCP Profile and is associated with the virtual server (of type LB, CS, VPN) or the service configured on NetScaler
- 7.5 High severity
ADC: Externally Controlled Reference to a Resource in Another Sphere
Arbitrary File Read (Unauthenticated) in NetScaler ADC and NetScaler Gateway if the access to NSIP, Cluster Management IP or SNIP with management access is enabled
- 7.7 High severity
ADC: Concurrent Execution using Shared Resource with Improper Synchronization
Race Condition in NetScaler ADC and NetScaler Gateway when appliance is configured as Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server leading to User Session Mixup
- 9.8 Critical severity
Citrix NetScaler Out-of-Bounds Read Exploited
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
- 8.7 High severity
ADC: Improper Validation of Specified Quantity in Input
Improper access control on the NetScaler Management Interface in NetScaler ADC and NetScaler Gateway when an attacker can get access to the appliance NSIP, Cluster Management IP or local GSLB Site IP or SNIP with Management Access
- 9.8 Critical severity
ADC: Improper Restriction of Operations within the Bounds of a Memory Buffer
Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) with PCoIP Profile bounded to i
- 9.8 Critical severity
Citrix NetScaler Memory Overflow Exploited
Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server (OR) NetScaler ADC and
- 9.8 Critical severity
Citrix NetScaler ADC and Gateway Buffer Overflow Exploited
Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
- 7.5 High severity
Citrix NetScaler ADC and Gateway Out-of-Bounds Read Exploited
Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
- 8.1 High severity
NetScaler ADC: Files or Directories Accessible to External Parties
Authenticated user can access unintended user capabilities in NetScaler ADC and NetScaler Gateway if the appliance must be configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) with KCDAccount configuration for Kerberos SSO to access backend resources
- 8.1 High severity
NetScaler ADC: Out-of-bounds Write
Memory safety vulnerability leading to memory corruption and Denial of Service in NetScaler ADC and Gateway if the appliance must be configured as a Gateway (VPN Vserver) with RDP Feature enabled OR the appliance must be configured as a Gateway (VPN Vserver) a