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9.2Critical KEV

CVE-2025-7775Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service

NetScaler ADC; NetScaler Gateway Published: (1 year ago)

Known exploited — Citrix NetScaler Memory Overflow Vulnerability

CISA confirmed this vulnerability is used in real attacks on 26.08.2025. Remediation deadline for US federal agencies: 28.08.2025.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938 ; https://nvd.nist.gov/vuln/detail/CVE-2025-7775

Description

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 NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with IPv6 services or servicegroups bound with IPv6 servers (OR) NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with DBS IPv6 services or servicegroups bound with IPv6 DBS servers (OR) CR virtual server with type HDX

Weakness (CWE): CWE-119

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

VendorProductVersions
citrix netscaler application delivery controller 12.1 – < 12.1-55.330
citrix netscaler gateway 13.1 – < 13.1-59.22
NetScaler ADC 14.1 – < 47.48, 13.1 – < 59.22, 13.1 FIPS and NDcPP – < 37.241, 12.1 FIPS and NDcPP – < 55.330
NetScaler Gateway 14.1 – < 47.48, 13.1 – < 59.22, 13.1 FIPS and NDcPP – < 37.241, 12.1 FIPS and NDcPP – < 55.330

References and patches

CPE matches (NVD) (8)
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* ≥ 12.1 < 12.1-55.330
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* ≥ 12.1 < 12.1-55.330
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* ≥ 13.1 < 13.1-37.241
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* ≥ 13.1 < 13.1-37.241
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* ≥ 13.1 < 13.1-59.22
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* ≥ 14.1 < 14.1-47.48
  • cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* ≥ 13.1 < 13.1-59.22
  • cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* ≥ 14.1 < 14.1-47.48

Recent CVEs in the same product — Citrix NetScaler ADC / Gateway