Two critical zero-day vulnerabilities in Citrix NetScaler ADC (formerly Citrix ADC) and Citrix NetScaler Gateway (formerly Citrix Gateway) are under active exploitation and require immediate patching. The vulnerabilities are part of a batch of eight flaws detailed in a Citrix security bulletin issued on September 27, 2026. Six of the vulnerabilities are rated high severity, with CVSS v4.0 severity scores between 7.0 and 8.8.
Citrix Patches Actively Exploited NetScaler ADC & NetScaler Gateway Vulnerabilities
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