CVE-2025-5777

NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread

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

CVSS 4.0 · 9.3 Critical EPSS 100.0% KEV · Listed

Vendors

Citrix Netscaler

Products

Netscaler Application Delivery Controller Netscaler Gateway Adc and 1 more

CVE-2026-88779

Memory overflow vulnerability leading to Denial of Service

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.

CVSS 4.0 · 8.7 High EPSS 11.4% KEV · Listed

Vendors

Citrix Netscaler

Products

Netscaler Application Delivery Controller Netscaler Gateway Adc and 1 more

CVE-2026-88774

Feature policy bypass due to improper HTTP URL based expression usage

Vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to a feature policy bypass due to improper HTTP URL based expression usage.

CVSS 4.0 · 7 High EPSS < 1% KEV · Not listed

Vendors

Citrix

Products

Netscaler Adc Netscaler Application Delivery Controller Netscaler Gateway

CVE-2026-88778

TCP Initial Sequence Number (ISN) prediction

Predictable exact value from previous values vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Citrix

Products

Netscaler Adc Netscaler Application Delivery Controller Netscaler Gateway

CVE-2026-88776

Memory overflow vulnerability leading to unpredictable or erroneous behavior or Denial of Service

Memory overflow vulnerability vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23  leading to unpredictable or erroneous behavior or Denial of Service

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Citrix

Products

Netscaler Adc Netscaler Application Delivery Controller Netscaler Gateway

CVE-2026-88777

Memory overflow vulnerability leading to unpredictable or erroneous behavior or Denial of Service

Memory overflow vulnerability vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23  leading to unpredictable or erroneous behavior or Denial of Service

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Citrix

Products

Netscaler Adc Netscaler Application Delivery Controller Netscaler Gateway

CVE-2026-88775

Memory overflow vulnerability leading to unpredictable or erroneous behavior or Denial of Service

Memory overflow vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading Memory overflow vulnerability leading to unpredictable or erroneous behavior or Denial of Service

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Citrix

Products

Netscaler Adc Netscaler Application Delivery Controller Netscaler Gateway

CVE-2026-88773

HTTP Request Smuggling

Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1-37.279 and NDcPP; Gateway: before 14.1-73.37 FIPS and before 13.1-64.23.

CVSS 4.0 · 9.3 Critical EPSS 3.1% KEV · Not listed

Vendors

Citrix

Products

Netscaler Adc Netscaler Application Delivery Controller Netscaler Gateway

CVE-2026-88772

Memory overflow vulnerability leading to Remote Code Execution or Denial of Service

Vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to Remote Code Execution or Denial of Service

CVSS 4.0 · 9.5 Critical EPSS 76.6% KEV · Listed

Vendors

Citrix

Products

Netscaler Adc Netscaler Application Delivery Controller Netscaler Gateway

CVE-2026-88771

A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands

Improper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to an unauthenticated attacker to execute arbitrary commands.

CVSS 4.0 · 9.5 Critical EPSS 81.9% KEV · Listed

Vendors

Citrix

Products

Netscaler Adc Netscaler Application Delivery Controller Netscaler Gateway

CVE-2026-19490

NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-19490

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.

CVSS 4.0 · 9.3 Critical EPSS 33.3% KEV · Listed

Vendors

Citrix Netscaler

Products

Netscaler Application Delivery Controller Netscaler Gateway Adc and 1 more

CVE-2026-8452

Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service

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

CVSS 4.0 · 8.8 High EPSS 1.0% KEV · Listed

Vendors

Citrix Netscaler

Products

Netscaler Application Delivery Controller Netscaler Gateway Adc and 1 more

CVE-2026-10816

Arbitrary File Read (Unauthenticated)

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

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Citrix Netscaler

Products

Netscaler Application Delivery Controller Netscaler Gateway Adc and 1 more

CVE-2026-8451

Insufficient input validation leading to memory overread

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

CVSS 4.0 · 8.8 High EPSS 14.2% KEV · Not listed

Vendors

Citrix Netscaler

Products

Netscaler Application Delivery Controller Netscaler Gateway Adc and 1 more

CVE-2026-10817

Insufficient input validation leading to memory overread

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

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Citrix Netscaler

Products

Netscaler Application Delivery Controller Netscaler Gateway Adc and 1 more

CVE-2026-8655

Multiple Memory overflow vulnerabilities leading to unpredictable or erroneous behavior and Denial of Service

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 NetScaler ADC is configured as a DNS recursive resolver deployment

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Citrix Netscaler

Products

Netscaler Application Delivery Controller Netscaler Gateway Adc and 1 more

CVE-2026-13474

Denial of service via malformed HTTP/2 requests

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

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Citrix Netscaler

Products

Netscaler Application Delivery Controller Netscaler Gateway Adc and 1 more

CVE-2026-3055

Insufficient input validation leading to memory overread

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

CVSS 4.0 · 9.3 Critical EPSS 91.5% KEV · Listed

Vendors

Citrix Netscaler

Products

Netscaler Application Delivery Controller Netscaler Gateway Adc and 1 more

CVE-2025-5349

NetScaler ADC and NetScaler Gateway - Improper access control on the NetScaler Management Interface

Improper access control on the NetScaler Management Interface in NetScaler ADC and NetScaler Gateway

CVSS 4.0 · 8.7 High EPSS 6.6% KEV · Not listed

Vendors

Citrix

Products

Netscaler Application Delivery Controller Netscaler Gateway

CVE-2025-6543

Memory overflow vulnerability leading to unintended control flow and Denial of Service

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

CVSS 4.0 · 9.2 Critical EPSS 10.4% KEV · Listed

Vendors

Citrix Netscaler

Products

Netscaler Application Delivery Controller Netscaler Gateway Adc and 1 more