The recent WannaCry attack was interesting for a couple of reasons. First, the speed and scale of the attack was impressive. Over the course of a couple of days, hundreds of thousands of systems were affected and disrupted.
Second, it also unveiled a disturbing trend. The attack malware exploited a known vulnerability that not only had been revealed through the highly public release of stolen cyber tools, but Microsoft had also released a patch for the targeted vulnerability over two months before. Which means that the scale of the attack was the direct result of poor security management, not only in terms of failing to patch a highly publicized vulnerability, but also failing to update existing security tools with signatures from a variety of security vendors that had been designed to identify and block the attack.