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 devices improperly processes incoming malformed HTTP traffic at high rate. This could allow an unauthenticated remote attacker to force the device entering the stop/defect state, thus creating a denial of service condition.

• CWE-20

• https://cert-portal.siemens.com/productcert/html/ssa-625789.html

Published

Oct 14, 2025

Last Modified

Jun 16, 2026

Status

Deferred

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