1.0Drinking Waterhttps://vdh.es.virginia.gov/drinking-watermatthewframehttps://vdh.es.virginia.gov/drinking-water/author/matthewframe/Defending Against an Active Threat to Siemens S7 Series PLCs - Drinking Waterrich600338<blockquote class="wp-embedded-content" data-secret="xnTvgu0rYD"><a href="https://vdh.es.virginia.gov/drinking-water/2026/07/29/updated-cybersecurity-advisory/">Defending Against an Active Threat to Siemens S7 Series PLCs</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://vdh.es.virginia.gov/drinking-water/2026/07/29/updated-cybersecurity-advisory/embed/#?secret=xnTvgu0rYD" width="600" height="338" title="“Defending Against an Active Threat to Siemens S7 Series PLCs” — Drinking Water" data-secret="xnTvgu0rYD" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script>
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https://vdh.es.virginia.gov/content/uploads/sites/14/CISA-logo.png244211Overview The National Security Agency (NSA) has issued a cybersecurity advisory to inform owners and operators of Siemens S7-series Programmable Logic Controllers (PLCs) of an active cyber threat to these industrial control systems (ICSs). Recommended Actions EPA recommends water and wastewater systems review the tactics, techniques, and procedures (TTPs) in the advisory and the potential […]