What is CVE-2011-20002?

CVE-2011-20002 is a high-severity vulnerability in Siemens Simatic S7-1200 Cpu V1 Family (Incl. Siplus Variants), classified under Authentication Bypass by Capture-replay. CVSS score: 7.4/10. Published 2025-10-14.

How severe is CVE-2011-20002?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Siemens Simatic S7-1200 Cpu V1 Family (Incl. Siplus Variants)

CVE-2011-20002

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 cap…

EPSS: 0.003 (20.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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-294 — Authentication Bypass by Capture-replay

References

productcert@siemens.com

Frequently asked questions

What is CVE-2011-20002?: CVE-2011-20002 is a high-severity vulnerability in Siemens Simatic S7-1200 Cpu V1 Family (Incl. Siplus Variants), classified under Authentication Bypass by Capture-replay. CVSS score: 7.4/10. Published 2025-10-14.
How severe is CVE-2011-20002?: High severity. CVSS v3 base score is 7.4 out of 10.