Stuxnet is the first publicly-known malicious software program written specifically to exploit vulnerabilities in a SCADA system. Analysts for long have warned that SCADA systems — especially older ones — have several exploitable vulnerabilities. The potential for such attacks has risen sharply in recent years. The emergence of threats drives home the need for more federal oversight of cybersecurity matters in the utilities sector, a security expert says. So far there have been at least 170 known cyber-related outages in the US, including three that caused widespread regional outages.”]
Source: https://www.csoonline.com/article/2125337/stuxnet-renews-power-grid-security-concerns.html