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CVE-2011-20001 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://cert-portal.siemens.com/productcert/html/ssa-625789.html	[email protected]	AdvisoryBundleRemedyVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-20	Improper Input Validation	[email protected]

Affected Products

Product	Versions
Siemens SIMATIC S7-1200 CPU V1	< V2.0.3
CPE cpe:2.3:h:siemens:simatic_s7_1200_cpu:::::::: cpe:2.3:o:siemens:simatic_s7_1200_cpu_firmware:::::::: cpe:2.3:o:siemens:simatic_s7-1200_cpu_firmware:::::::: cpe:2.3:o:siemens:s7-1200_cpu_firmware:::::::: cpe:2.3:h:siemens:simatic_s7-1200_v4:::::::: cpe:2.3:o:siemens:simatic_s7-1200_v4_firmware:::::::: cpe:2.3:h:siemens:simatic_s7-1200:::::::: cpe:2.3:o:siemens:simatic_s7-1200_firmware:::::::: Remediation Workaround:low effort Disable the web server if possible.
Siemens SIMATIC S7-1200 CPU V2	All versions
CPE No CPEs found in CPE dictionary for this product. Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Jun 16, 2026	CVE Modified	[email protected]
Jun 16, 2026	CVE Modified	CISA-ADP
Oct 14, 2025	New CVE Received	[email protected]