CISA tells operators to harden Siemens S7 PLCs. Here’s how to do it without disrupting production
Disabling a protocol, limiting S7 communications or updating firmware can close an attack path. It can also disconnect an HMI, engineering station or remote I/O. Operators need a dependency-led change plan, not a generic security checklist.
By Sabine Frömling
9 Sep 2026 8 mins
Network SecuritySecurity HardwareThreat and Vulnerability Management