On 19 August 2026, US DHS CISA partnered with National Security Agency and other US government partners to publish a joint Cybersecurity Advisory about an active threat targeting Siemens S7 series programmable logic controllers (PLCs). The advisory, Defending Against an Active Threat to Siemens S7 Series PLCs, provides an overview of the threat activity, and mitigations to protect and defend against this activity.
Threat actors are conducting targeted reconnaissance and capability developme
