Hackers Actively Probing Citrix NetScaler Systems Before Major Attack Wave

Hackers target Citrix NetScaler systems exploiting CVE-2026-3055 vulnerability. Experts urge immediate patching to prevent data breaches.

By Content Team

Mar 29, 2026

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Cybersecurity researchers are warning that hackers are actively scouting Citrix NetScaler systems before launching attacks exploiting CVE-2026-3055, a critical vulnerability with a 9.3 severity score. The flaw affects NetScaler ADC and Gateway appliances configured as SAML Identity Providers, commonly used in enterprise single sign-on environments.

Threat intelligence firms watchTowr and Defused Cyber detected attackers using POST requests to probe the /cgi/GetAuthMethods endpoint, systematically identifying vulnerable configurations. This reconnaissance allows hackers to build targeted lists of susceptible systems without triggering the actual exploit.

The vulnerability enables unauthenticated attackers to extract sensitive data through memory overread, similar to previous "CitrixBleed" exploits. Security experts warn the window between current probing and mass exploitation is rapidly closing, urging immediate patching.

Source: Cybersecurity News

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