Three of the ten most exploited weaknesses were called unforgivable in 2007
CISA's review of 2024 and 2025 finds that the flaws attackers actually use are injection, input validation and path traversal — the same list as two decades ago. Seven of the ten most frequent weaknesses on the exploited-vulnerabilities catalog account for 41.5% of everything on it. CISA blames culture and workflow, not difficulty.