Active Reconnaissance on Citrix NetScaler for CVE-2026-3055 Memory Overread Vulnerability

Citrix NetScaler ADC and Gateway are currently under scrutiny due to a serious vulnerability that allows memory overread, potentially exposing sensitive data.

3 min readSecurity

A newly identified security vulnerability affecting Citrix NetScaler ADC and NetScaler Gateway has come to light, prompting active reconnaissance efforts as reported by Defused Cyber and watchTowr. This flaw, designated as CVE-2026-3055, has been assigned a high CVSS score of 9.3, indicating its severity. The issue stems from inadequate input validation, which can lead to memory overread scenarios. Attackers may exploit this weakness to access and extract sensitive information from the affected systems. Organizations using Citrix products are urged to assess their environments for this vulnerability and implement necessary security measures to mitigate potential risks. Continuous monitoring and prompt updates are essential to safeguard against potential exploitation.

Security