Reader Mark Wilson writes: One of the greatest concerns surrounding the growth of the Internet of Things (IoT) is its security, and it seems that some people's worst fears have just been realized. Security experts at Trend Micro have discovered a vulnerability in Qualcomm Snapdragon-produced SoC (system on a chip) devices. In fact, it is the same vulnerability that cropped up earlier in the month, affecting Nexus 5, Nexus 6, Nexus 6P and Samsung Galaxy Edge Android handsets. This in itself is concerning as these are devices that are no longer in line for security updates, but more concerning is the fact that the same chips are used in IoT devices. The vulnerability makes it possible for an attacker to gain root access to the hardware, and this is worrying in a world of inter-connected devices. In the interests of trying to contain the problem, Trend Micro has not revealed full details of the vulnerability but is using the issue to highlight a serious problem not just for handset owners but also for adopters of the IoT.