We all love the fast-charging capabilities of many modern smartphones, but a security company has discovered that hundreds of millions of fast-charging-capable adapters and power banks are vulnerable to hacker attacks and can damage hardware. According to Tencent Security Xuanwu Lab, the issue is considered one of the most widespread attacks against the physical world from the digital world. All adapters and power banks have power management circuitry controlled by a Power Management IC (PMIC) with its own firmware. Every time a device is connected to an adapter or bank, it negotiates the necessary voltage and current settings, that is, when the charger's firmware becomes vulnerable to attack by malware residing on the terminal device (or elsewhere).