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CVE-2026-19490 is a critical authentication bypass vulnerability in NetScaler ADC and NetScaler Gateway. The issue has been described as an authentication bypass using an alternate path, indicating that an attacker can reach protected functionality through an unintended request path or authentication flow that does not correctly enforce access controls. The vulnerability affects NetScaler ADC versions 14.1 through 73.32 and 13.1 through 63.21, and NetScaler Gateway versions 14.1 through 73.32 and 13.1 through 63.21. Available information indicates the vulnerable condition is associated with deployments using SAML authentication together with authentication or VPN virtual server configurations.
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No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical remote authentication bypass vulnerability in Citrix NetScaler ADC and NetScaler Gateway that can be exploited over the network by an unauthenticated attacker.
An authentication bypass vulnerability in Citrix NetScaler ADC and NetScaler Gateway. Exploitation prerequisites involve specific SAML action and authentication/VPN vServer configurations.
A vulnerability affecting NetScaler ADC and NetScaler Gateway versions 14.1 through 73.32 and 13.1 through 63.21.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.