CVE-2025-7775
Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service
Citrix NetScaler Memory Overflow Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
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.
CISA notes
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
Severity
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:LExploitation Context
as of October 13, 2026- CISA added CVE-2025-7775 to the KEV catalog on the day its CVE record was published. The median for entries added in 2025 is 26 days.
- It is one of 27 Citrix entries in the CISA KEV catalog, and one of 5 added in 2025.
- Its current EPSS score (20.3%) is higher than that of 35% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| NetScaler | NetScaler ADC | 14.1 to <47.48 13.1 to <59.22 13.1 FIPS and NDcPP to <37.241 12.1 FIPS and NDcPP to <55.330 |
| NetScaler | NetScaler Gateway | 14.1 to <47.48 13.1 to <59.22 13.1 FIPS and NDcPP to <37.241 12.1 FIPS and NDcPP to <55.330 |
References
1 LinksRecord Details
More from Citrix
NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-19490
Insufficient input validation leading to memory overread
Memory overflow vulnerability leading to Remote Code Execution or Denial of Service
A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands
Related
Tool categories
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.