CVE-2011-20001 describes a denial-of-service vulnerability affecting Siemens SIMATIC S7-1200 CPU V1 and V2 families (including SIPLUS variants) with firmware versions prior to V2.0.3. An unauthenticated remote attacker can exploit this by sending a high rate of malformed HTTP traffic to the device's web server interface, forcing it into a stop/defect state. This vulnerability has a CVSS v3.1 score of 7.5 (High), indicating a network-based attack with low complexity and high impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| Siemens | SIMATIC S7-1200 CPU V1 Family (Incl. SIPLUS Variants) | >= 0, < V2.0.3CNA affecteddefault unknown | |
| Siemens | SIMATIC S7-1200 CPU V2 Family (Incl. SIPLUS Variants) | >= 0, < V2.0.3CNA affecteddefault unknown |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.