The exploitation of the Citrix NetScaler ADC zero-day vulnerability (CVE-2023-3519) was first spotted by a critical infrastructure organization, who reported it to the Cybersecurity and Infrastructure Security Agency (CISA). “In June 2023, threat actors exploited this vulnerability as a zero-day to drop a webshell on a critical infrastructure organization’s non-production environment NetScaler ADC appliance. The webshell enabled the actors to perform discovery on the victim’s active directory (AD) and collect and exfiltrate AD data. The … More →

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