The 10 must-attend sessions at Black Hat 2021

This Black Hat program summary outlines numerous security research briefings that reveal serious vulnerabilities and attack techniques across networking, cloud, web, and blockchain platforms — including universal Wi‑Fi fragmentation/aggregation flaws (FragAttacks), cross‑account AWS service vulnerabilities enabling S3 access, HTTP/2 desync/exploitation, DNS‑as‑a‑Service information leakage affecting hundreds of thousands of endpoints, IPv6 EUI‑64 based street‑level geolocation of millions of routers, JSON deserialization RCE leading to blockchain node compromise and covert asset theft, high‑precision remote timing attacks, and ML approaches for brand‑impersonation detection.