An astonishing fact about Stuxnet — the computer worm that wreaked havoc on Iranian nuclear facilities a decade ago — was that it exploited what are known as four “zero days” in the facility’s software. A zero day is a vulnerability that had not been exposed before. Think of it as a bad hair day for your operating system.
It turns out that smart city systems are much more vulnerable than those facilities ever were. At the Black Hat cybersecurity conference, IBM revealed that it had discovered 17 zero days in smart city systems. Eight of these are deemed ‘critical’. Read more about smart city vulnerabilities here.