CVE-2011-20001 HIGH

CVE-2011-20001

Vendor Siemens
Product SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants)
Weakness CWE-20 · Input validation
Published October 14, 2025
Last update October 14, 2025
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

October 14, 2025 CVE published
October 14, 2025 Record updated