CVE-2011-20001 - CVE House
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Status published High CVE-2011-20001

A vulnerability has been identified in SIMATIC S7-1200 CPU V1...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

Affected Vendor

Affected Software

SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants), SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants)
Vulnerable Versions:
0

Timeline

Official Publish: October 14th, 2025
Last Modified: October 14th, 2025
Added to House: July 19th, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)