What’s Vulnerable › Vulnerabilities
CVE-2011-20002
- Severity: high (CVSS 7.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-10-14 · updated 2026-06-16
- Weakness: CWE-294
Description
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
How to fix
Upgrade to a fixed version: Siemens SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) V2.0.2; Siemens SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) V2.0.2. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2011-20002 or the next vulnerability affects your stack