Threats·Cloud & SaaSBreakingESnet iperf3 Server Watchdog Race Condition Enables Remote Heap Use-After-Free Exploitation (CVE-2026-101276)A critical heap use-after-free vulnerability in ESnet iperf3 v3.21 allows unauthenticated remote attackers to crash network test daemons or execute code.Priya Raman1 Oct 202611 min read