Citrix
Citrix Netscaler Application Delivery Controller: vulnerabilities and CVEs
Citrix Netscaler Application Delivery Controller has 39 published vulnerabilities, 16 of them in the last 12 months. 9 are rated critical and 12 are listed by CISA as actively exploited.
CVEs39
Last 12 months16
Critical9
Actively exploited12
All vulnerabilities in the catalogue →⭐ Follow this technology
🔴 Actively exploited (CISA KEV)
| CVE | Severity | EPSS | Active exploitation | Published | Description |
|---|---|---|---|---|---|
| CVE-2026-88772 | Critical (9.5) | 1.3% | ⚠ Active exploitation | Sep 27, 2026 | 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… |
| CVE-2026-88771 | Critical (9.5) | 1.1% | ⚠ Active exploitation | Sep 27, 2026 | 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;… |
| CVE-2026-19490 | Critical (9.3) | 7.0% | ⚠ Active exploitation | Aug 19, 2026 | 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. |
| CVE-2026-8452 | High (8.8) | 1.0% | ⚠ Active exploitation | Jun 30, 2026 | 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… |
| CVE-2026-3055 | Critical (9.3) | 4.0% | ⚠ Active exploitation | Mar 23, 2026 | Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread |
| CVE-2025-7775 | Critical (9.2) | 20% | ⚠ Active exploitation | Aug 26, 2025 | 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… |
| CVE-2025-5777 | Critical (9.3) | 100% | ⚠ Active exploitation | Jun 17, 2025 | 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 |
| CVE-2025-6543 | Critical (9.2) | 11% | ⚠ Active exploitation | Jun 25, 2025 | 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… |
| CVE-2023-6549 | High (7.5) | 58% | ⚠ Active exploitation | Jan 17, 2024 | Improper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway allows Unauthenticated Denial of Service and Out-Of-Bounds Memory Read |
| CVE-2023-6548 | High (8.8) | 3.2% | ⚠ Active exploitation | Jan 17, 2024 | Improper Control of Generation of Code ('Code Injection') in NetScaler ADC and NetScaler Gateway allows an attacker with access to NSIP, CLIP or SNIP with management interface to perform Authenticated (low privileged)… |
| CVE-2023-4966 | High (7.5) | 100% | ⚠ Active exploitation | Oct 10, 2023 | Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server. |
| CVE-2023-3519 | Critical (9.8) | 100% | ⚠ Active exploitation | Jul 19, 2023 | Unauthenticated remote code execution |
Latest vulnerabilities
| CVE | Severity | EPSS | Active exploitation | Published | Description |
|---|---|---|---|---|---|
| CVE-2026-88778 | High (8.8) | 0.38% | — | Sep 27, 2026 | 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… |
| CVE-2026-88777 | High (8.8) | 0.38% | — | Sep 27, 2026 | 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… |
| CVE-2026-88776 | High (8.8) | 0.38% | — | Sep 27, 2026 | 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… |
| CVE-2026-88775 | High (8.8) | 0.38% | — | Sep 27, 2026 | 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:… |
| CVE-2026-88774 | High (7) | 0.24% | — | Sep 27, 2026 | 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… |
| CVE-2026-88773 | Critical (9.3) | 0.36% | — | Sep 27, 2026 | 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… |
| CVE-2026-88772 | Critical (9.5) | 1.3% | ⚠ Active exploitation | Sep 27, 2026 | 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… |
| CVE-2026-88771 | Critical (9.5) | 1.1% | ⚠ Active exploitation | Sep 27, 2026 | 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;… |
| CVE-2026-19490 | Critical (9.3) | 7.0% | ⚠ Active exploitation | Aug 19, 2026 | 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. |
| CVE-2026-8655 | High (8.8) | 0.63% | — | Jun 30, 2026 | 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… |
| CVE-2026-8452 | High (8.8) | 1.0% | ⚠ Active exploitation | Jun 30, 2026 | 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… |
| CVE-2026-8451 | High (8.8) | 0.50% | — | Jun 30, 2026 | 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 |
| CVE-2026-13474 | High (8.7) | 0.56% | — | Jun 30, 2026 | 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… |
| CVE-2026-10817 | Medium (6.9) | 0.56% | — | Jun 30, 2026 | 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… |
| CVE-2026-10816 | High (7.1) | 0.58% | — | Jun 30, 2026 | 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 |
| CVE-2026-3055 | Critical (9.3) | 4.0% | ⚠ Active exploitation | Mar 23, 2026 | Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread |
| CVE-2025-7776 | High (8.8) | 6.9% | — | Aug 26, 2025 | 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,… |
| CVE-2025-7775 | Critical (9.2) | 20% | ⚠ Active exploitation | Aug 26, 2025 | 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… |
| CVE-2025-6543 | Critical (9.2) | 11% | ⚠ Active exploitation | Jun 25, 2025 | 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… |
| CVE-2025-5777 | Critical (9.3) | 100% | ⚠ Active exploitation | Jun 17, 2025 | 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 |
| CVE-2025-5349 | High (8.7) | 6.2% | — | Jun 17, 2025 | Improper access control on the NetScaler Management Interface in NetScaler ADC and NetScaler Gateway |
| CVE-2024-8535 | Medium (5.8) | 0.42% | — | Nov 12, 2024 | 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… |
| CVE-2024-8534 | High (8.4) | 0.56% | — | Nov 12, 2024 | 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… |
| CVE-2024-5492 | Medium (5.1) | 0.55% | — | Jul 10, 2024 | Open redirect vulnerability allows a remote unauthenticated attacker to redirect users to arbitrary websites in NetScaler ADC and NetScaler Gateway |
| CVE-2024-5491 | High (7.2) | 0.76% | — | Jul 10, 2024 | Denial of Service in NetScaler ADC and NetScaler Gateway in NetScaler |
| CVE-2023-6549 | High (7.5) | 58% | ⚠ Active exploitation | Jan 17, 2024 | Improper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway allows Unauthenticated Denial of Service and Out-Of-Bounds Memory Read |
| CVE-2023-6548 | High (8.8) | 3.2% | ⚠ Active exploitation | Jan 17, 2024 | Improper Control of Generation of Code ('Code Injection') in NetScaler ADC and NetScaler Gateway allows an attacker with access to NSIP, CLIP or SNIP with management interface to perform Authenticated (low privileged)… |
| CVE-2023-4967 | High (7.5) | 0.89% | — | Oct 27, 2023 | Denial of Service in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA Virtual Server |
| CVE-2023-4966 | High (7.5) | 100% | ⚠ Active exploitation | Oct 10, 2023 | Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server. |
| CVE-2023-3467 | High (8) | 1.3% | — | Jul 19, 2023 | Privilege Escalation to root administrator (nsroot) |