Security professionals straw-polled to tell what they think the single biggest security threat of the next year will be. This year we heard from 72 security professionals and have summarised the responses below. Ransomware (11), employees (12) and IoT (6) and threats to critical infrastructure (5) were also raised by multiple individuals. Out of 72 usable responses we found a strong leaning towards ransomware (11) and employees. The responses have been grouped below in the following sections.”]
Source: https://www.csoonline.com/article/3249497/what-single-biggest-security-threat-2018.html