CVEvulnerability

CVE-2025-7775

9.2 CRITICAL Known exploited Published 2025-08-26 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Citrix NetScaler Memory Overflow Vulnerability — Citrix NetScaler

Citrix NetScaler ADC and NetScaler Gateway contain a memory overflow vulnerability that could allow for remote code execution and/or denial of service.

Added to KEV: 2025-08-26
Remediation due: 2025-08-28
Ransomware use: Unknown
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.
Notes: https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938 ; https://nvd.nist.gov/vuln/detail/CVE-2025-7775

Status: Analyzed
Published: 2025-08-26
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 4.0 ([email protected]): 9.2 CRITICAL — CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected]): 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses: CWE-119

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

Affected configurations

• citrix netscaler application delivery controller (>= 12.1 < 12.1-55.330) • citrix netscaler application delivery controller (>= 13.1 < 13.1-37.241) • citrix netscaler application delivery controller (>= 13.1 < 13.1-59.22) • citrix netscaler application delivery controller (>= 14.1 < 14.1-47.48) • citrix netscaler gateway (>= 13.1 < 13.1-59.22) • citrix netscaler gateway (>= 14.1 < 14.1-47.48)

Weakness · CWE (1)

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer weakness

References