86% of Phishing Attacks are AI Driven, KnowBe4 Research Finds

KnowBe4's Phishing Threat Trends Report Volume Seven reveals that 86% of phishing attacks are now AI-driven. Key findings from the last six months include a 49% increase in calendar invite phishing, a 139% surge in reverse proxy use to steal Microsoft 365 credentials, and a 41% rise in Microsoft Teams attacks. The report highlights a shift from single-vector attacks to multi-channel orchestration, with internal team impersonation appearing in 30% of Q1 2026 attacks. Cybercriminals are expanding beyond email to target collaboration tools and calendars, making social engineering more targeted and harder to detect.