A critical day in cybersecurity for March 17, 2026, saw CISA add an actively exploited Wing FTP Server flaw (CVE-2025-47813) to its KEV catalog, while Fortinet rushed patches for three critical, exploited firewall vulnerabilities. Geopolitical tensions flared as Poland thwarted a cyberattack on its national nuclear research center, with officials suspecting a potential false flag operation. Meanwhile, the EU sanctioned Chinese and Iranian firms for cyberattacks, and the Medusa ransomware gang claimed responsibility for crippling attacks on a major U.S. hospital and a New Jersey county.
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