GreyNoise 2025 Mass Internet Exploitation Report

A Data-Driven Look at Mass Exploitation 

Mass exploitation is faster and broader than ever. 40% of exploited CVEs in 2024 were at least four years old — some dating back to the 1990s. Attackers are targeting zero-days within hours of disclosure and continue targeting old vulnerabilities years — sometimes decades — after disclosure, necessitating a comprehensive approach to defense. 

‍The GreyNoise 2025 Mass Internet Exploitation Report breaks down real-world exploitation trends so CISOs can assess strategic changes to their cybersecurity program and so security professionals can prioritize what matters. 

What’s Inside the Report? 

• ✅ Top Exploited CVEs in 2024 – The vulnerabilities attackers targeted most.
• ✅ Exploitation Before KEV – GreyNoise observed multiple CVEs showing signs of exploitation before being added to CISA’s Known Exploited Vulnerabilities (KEV) catalog.
• ✅ Ransomware & Mass Exploitation – How attackers automate mass exploitation for initial access.
• ✅ Defensive Insights for 2025 – Actionable takeaways to strengthen security strategy and tactical prowess. 

Why Download?

• Reduce noise – Focus on vulnerabilities with real attacker activity. 
• Improve patching decisions – Prioritize based on real-world exploitation. 
• Stay ahead – Get early warning on mass exploitation trends. 

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