ot network security

  1. Siemens S7 DoS CVE-2025-40944: Mitigations for ET 200 Devices

    Siemens has warned that a flaw in the way several SIMATIC and SIPLUS ET 200 devices handle S7 protocol session disconnects can be weaponized to cause a denial‑of‑service (DoS) condition: a properly formed S7 Disconnect Request (a COTP DR TPDU) sent to TCP port 102 may push the device into an...
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