Hackers Started Exploiting CitrixBleed 2 Vulnerability Before Public PoC Disclosure

Researchers detected an active exploitation of CVE-2025-5777, dubbed CitrixBleed 2, nearly two weeks before a public proof-of-concept surfaced.  This memory overread vulnerability in Citrix NetScaler appliances enables adversaries to exfiltrate sensitive data from kernel space by sending malformed DTLS packets.  Initial reconnaissance and attack patterns were first observed on June 23, while the PoC was […]

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