CVE-2011-20002: Siemens SIMATIC s7-1200 CPU v1 Family Incl. Siplus Variants

High severity, CVSS 7.4. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) (All versions < V2.0.2), SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) (All versions < V2.0.2). Affected controllers are vulnerable to capture-replay in the communication with the engineering software. This could allow an on-path attacker between the engineering software and the controller to execute any previously recorded commands at a later time (e.g. set the controller to STOP), regardless whether or not the controller had a password configured.

Affected products

• Siemens SIMATIC s7-1200 CPU v1 Family Incl. Siplus Variants: before V2.0.2 (fixed in V2.0.2)
• Siemens SIMATIC s7-1200 CPU v2 Family Incl. Siplus Variants: before V2.0.2 (fixed in V2.0.2)

Published 2025-10-14. Last modified 2026-06-16.