What is CVE-2011-20001?

CVE-2011-20001 is a high-severity vulnerability in Siemens Simatic S7-1200 Cpu V1 Family (Incl. Siplus Variants), classified under Improper Input Validation. CVSS score: 7.5/10. Published 2025-10-14.

How severe is CVE-2011-20001?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Siemens Simatic S7-1200 Cpu V1 Family (Incl. Siplus Variants)

CVE-2011-20001

A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) (All versions < V2.0.3), SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) (All versions < V2.0.3). The web server interface of affected devic…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.004 (35.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Siemens Simatic S7-1200 Cpu V1 Family (Incl. Siplus Variants) — versions 0
Siemens Simatic S7-1200 Cpu V2 Family (Incl. Siplus Variants) — versions 0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

productcert@siemens.com

Frequently asked questions

What is CVE-2011-20001?: CVE-2011-20001 is a high-severity vulnerability in Siemens Simatic S7-1200 Cpu V1 Family (Incl. Siplus Variants), classified under Improper Input Validation. CVSS score: 7.5/10. Published 2025-10-14.
How severe is CVE-2011-20001?: High severity. CVSS v3 base score is 7.5 out of 10.