Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects CVE-2026-3055 Citrix NetScaler out-of-bounds memory-read exploitation via a GET request eliciting an oversized HTTP response body containing a leaked NSC_AAAC session cookie.
Detects potential NetScaler administrative session hijacking by monitoring for the usage of SESSID or NITRO_SK administrative cookies from multiple source IPs. Attackers leverage CVE-2026-3055 to steal these specific session cookies to gain unauthorized administrative access.
Detects HTTP GET requests to the vulnerable Citrix NetScaler /wsfed/passive?wctx endpoint, specifically looking for the malformed query string used in CVE-2026-3055 exploitation where 'wctx' is present without an associated value or '=' symbol. This rule combines common network appliance and web server logs to identify potential exploit attempts.