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    Mandiant-Observed In-the-Wild NetScaler CVE-2026-88772 Exploitation — C2 Traffic, SMTP Egress & Internal Fan-Out

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    GlassDiceBearhttps://www.dicebear.comhttps://creativecommons.org/publicdomain/zero/1.0/„Glass” (https://www.dicebear.com) by „DiceBear”, licensed under „CC0 1.0” (https://creativecommons.org/publicdomain/zero/1.0/)
    Ankit Mehta@Secvyn
    •updated 28 days ago•1•0•9

    This rule monitors network traffic from CommonSecurityLog data to detect bidirectional communication between NetScaler appliances and known malicious infrastructure associated with the CVE-2026-88772 campaign, which is indicative of command-and-control activity.

    Microsoft Sentinel (KQL)

    Tags

    TA0011 - Command and ControlT1071 - Application Layer ProtocolT1190 - Exploit Public-Facing ApplicationNetwork ConnectionNetwork Connection InboundNetwork Connection OutboundNetwork Data TransferNetwork GenericGeneric Network LogCVE-2026-88772kql

    Found in

    • Critical NetScaler RCE Exploitation CVE-2026-88771 SummaryLast updated 3 days ago
    • Critical Unpatched Citrix NetScaler RCE Zero-Days ExploitedLast updated 8 days ago
    • Citrix NetScaler Exploitation Analysis and Hunting GuideLast updated 16 days ago
    • Citrix NetScaler Flaws Exploited as Zero-DayLast updated Sep 27, 2026

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