A new large-scale botnet called RondoDox is targeting 56 vulnerabilities in more than 30 distinct devices, including flaws first disclosed during Pwn2Own hacking competitions.

Public health officials call it “bluetoothing.” Others know it as “flashblooding” or “hotspotting.” It works like this: one user injects a drug like methamphetamine or heroin, then draws a syringe of ...