High severity7.5NVD Advisory· Published Oct 14, 2025· Updated Apr 15, 2026
CVE-2011-20001
CVE-2011-20001
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.
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Affected products
1- Range: <V2.0.3
Patches
Vulnerability mechanics
References
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