The number of vulnerabilities exposing industrial control systems has increased 83 percent since 2011, says IBM Security’s X-Force Red. Security teams should be regarded as a top concern for security teams managing operational technology environments. The convergence of ICS and the industrial internet of things (IIoT) is one reason why we are seeing ICS vulnerabilities increase. The more pervasive the convergence becomes, the larger the attack surface gets over time. The introduction of an additional attack vector means only that an attacker has a new way to compromise ICS.”]
Source: https://securityintelligence.com/posts/industrial-control-systems-security-to-test-or-not-to-test/