CVE-2025-7775

What it is

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

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

In the wild

CISA lists this as exploited in real attacks. Treat as urgent.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2025-07-17 20:39 UTC ReservedThe CVE id was reserved by its CNA
2. 2025-08-26 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
3. 2025-08-26 13:15 UTC PublishedDisclosed publicly on CVE.org and NVD
4. 2025-08-28 Remediation deadlineCISA's due date for federal agencies to fix it
5. 2026-06-17 10:05 UTC Last updatedMost recent change to the record

Details

Published

2025-08-26 13:15 UTC

Last modified

2026-06-17 10:05 UTC

Added to CISA KEV

2025-08-26

Exploit probability

20.7% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Analyzed

Affected

• Citrix Netscaler Application Delivery Controller < 12.1-55.330
• Citrix Netscaler Application Delivery Controller < 13.1-37.241
• Citrix Netscaler Application Delivery Controller < 13.1-59.22
• Citrix Netscaler Application Delivery Controller < 14.1-47.48
• Citrix Netscaler Gateway < 13.1-59.22
• Citrix Netscaler Gateway < 14.1-47.48

Attack profile CVSS 4.0 · 9.2

Attack vector

Network

Complexity

High

Attack requirements

Present

Privileges needed

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

High