Executive Summary

Previdian reports attackers exploiting a critical‑severity authentication bypass in Citrix NetScaler (CVE‑2026‑19490). The flaw allows unauthenticated users to gain privileged access, enabling remote code execution and data exfiltration. The vulnerability is actively used in the wild, with threat actors leveraging it to compromise networks and exfiltrate sensitive data.

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Intelligence Metadata - Source Publisher: Bleeping Computer - Published Date: 2026-09-04T15:25:59+00:00 - Category: threat-intel

Original Description: Attackers have begun targeting a critical-severity Citrix NetScaler auth bypass flaw (CVE-2026-19490) in the wild, according to vulnerability intelligence company Previdian. [...]

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