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Amazon Reports Exploitation of Cisco ISE and Citrix NetScaler Zero-Days

Amazon Reports Exploitation of Cisco ISE and Citrix NetScaler Zero-Days

First seen 13 Nov 2025, 17:30 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

Amazon has identified an advanced threat actor exploiting zero-day vulnerabilities in Cisco Identity Service Engine (ISE) and Citrix NetScaler. The attackers deployed custom malware utilizing these previously undisclosed flaws, alongside multiple other vulnerabilities. This incident highlights significant risks to organizations using these technologies.

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