CVE-2011-20001A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl.
Updated under an hour ago ()
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It affects Siemens SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-20
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- siemens
- NVD analysis
- Deferred
- Record last updated
- Oct 14, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Siemens SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) siemens:simatic_s7_1200_cpu_v1_family_incl_siplus_variants (from the name) | before V2.0.3 | CNA record |
Siemens SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) siemens:simatic_s7_1200_cpu_v2_family_incl_siplus_variants (from the name) | before V2.0.3 | CNA record |
References
- https://cert-portal.siemens.com/productcert/html/ssa-625789.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.