The 2021 Network Security Report highlights how COVID-19 and remote work fueled cyber risks, with attackers exploiting unpatched VPNs like Pulse Secure, Citrix, and F5 BIG-IP, leading to major breaches such as Travelex. Videoconferencing platforms like Zoom and WebEx were hit by flaws enabling hijacking, credential theft, and ghost user access. Windows saw critical vulnerabilities including SMBGhost, SIGRed, and ZeroLogon, some wormable with CVSS 10 scores. The year closed with the SolarWinds supply chain attack, impacting 18,000 customers, showing the danger of unpatched flaws. Recommendations stress asset inventory, risk-based patching, continuous vulnerability management, and preparing for more complex, state-driven attacks.

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