7 CISA Mitigations for Siemens S7 PLCs: How Safetybits Covers Each One
On August 19, 2026, CISA, the NSA, the FBI, the DOE, and the EPA jointly published AA26-231A, warning of an active threat against Siemens S7 Series PLCs, the full family, S7-200 through S7-1500, including the F-series safety controllers. CISA is explicit this is not theoretical: threat actors are conducting reconnaissance and capability development against U.S. installations right now, and the technique generalizes to any exposed PLC, not only Siemens.