CVE-2025-5777 Citrix — Exploit & Vulnerability Details CRITICAL

Parameter	Value
CVSS	9.3 (CRITICAL)
Affected Versions	12.1 — 14.1-43.56
Fixed In	12.1-55.328
Type	CWE-908 (Use of Uninitialized Resource), CWE-457, CWE-125 (Out-of-bounds Read)
Vendor	Citrix
Public PoC	Yes

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

Attack Parameters

Attack Vector

Network

Can be exploited remotely

Attack Complexity

Low

Easy to exploit

Attack Requirements

None

No additional conditions

Privileges Required

None

No privileges needed

User Interaction

None

No user interaction needed

Impact Assessment

Confidentiality

High

Complete data leak

Integrity

High

Complete data modification

Availability

High

Complete denial of service

CVSS Vector v4.0

Weakness Type (CWE)

CWE-908 Use of Uninitialized Resource

CWE-457

CWE-125 Out-of-bounds Read

Vulnerable Products 7

Configuration	From (including)	Up to (excluding)
Citrix Netscaler_Application_Delivery_Controller cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::fips:::*	`12.1`	`12.1-55.328`
Citrix Netscaler_Application_Delivery_Controller cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::fips:::*	`13.1`	`13.1-37.235`
Citrix Netscaler_Application_Delivery_Controller cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::ndcpp:::*	`13.1`	`13.1-37.235`
Citrix Netscaler_Application_Delivery_Controller cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::-:::*	`13.1`	`13.1-58.32`
Citrix Netscaler_Application_Delivery_Controller cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::-:::*	`14.1`	`14.1-43.56`
Citrix Netscaler_Gateway cpe:2.3:a:citrix:netscaler_gateway::::::::	`13.1`	`13.1-58.32`
Citrix Netscaler_Gateway cpe:2.3:a:citrix:netscaler_gateway::::::::	`14.1`	`14.1-43.56`