7000+ Citrix NetScaler Devices Still Vulnerable to CVE-2025-5777 and CVE-2025-6543

Over 7,000 Citrix NetScaler appliances remain unpatched against two critical vulnerabilities: CVE-2025-5777 and CVE-2025-6543.  Despite multiple advisories from Citrix, CISA’s KEV catalog entries, and updates from national cybersecurity agencies—including the Dutch NCSC—threat actors continue to target unmitigated devices at scale. Key Takeaways1. Over 7,000 Citrix NetScaler appliances remain unpatched for CVE-2025-5777 (3,312) and CVE-2025-6543.2. Active […]

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