SB2025061749 - Multiple vulnerabilities in NetScaler ADC and NetScaler Gateway

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Main Vulnerability Database SB2025061749

SB2025061749 - Multiple vulnerabilities in NetScaler ADC and NetScaler Gateway

Published: June 17, 2025 Updated: October 31, 2025

Security Bulletin ID SB2025061749
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2025-5777)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition. A remote attacker can send specially crafted data to the server, trigger an out-of-bounds read error and read contents of memory on the system.

Successful exploitation of the vulnerability requires that NetScaler is configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.


2) Improper access control (CVE-ID: CVE-2025-5349)

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in NetScaler Management Interface. A remote non-authenticated attacker with access to NSIP, Cluster Management IP or local GSLB Site IP can bypass implemented security restrictions and gain unauthorized access to the application.


Remediation

Install update from vendor's website.

References