{"id":"CVE-2011-20001","state":"PUBLISHED","title":"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 ver","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.","publishedAt":"2025-10-14T09:14:53.944Z","updatedAt":"2025-10-14T18:57:37.446Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"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","source":"siemens"},"assigner":"siemens","products":["Siemens SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants)","Siemens SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants)"],"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants)","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"V2.0.3","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants)","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"V2.0.3","versionType":"custom"}]}],"references":["https://cert-portal.siemens.com/productcert/html/ssa-625789.html"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T19:39:57.898Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2011/20xxx/CVE-2011-20001.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2011-20001","state":"PUBLISHED","datePublished":"2025-10-14T09:14:53.944Z","dateUpdated":"2025-10-14T18:57:37.446Z","assignerShortName":"siemens","assignerOrgId":"cec7a2ec-15b4-4faf-bd53-b40f371f3a77","dateReserved":"2025-05-22T04:58:58.075Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants)","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"V2.0.3","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants)","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"V2.0.3","versionType":"custom"}]}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-625789.html"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"}},{"cvssV4_0":{"version":"4.0","vectorString":"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","baseScore":8.7,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"CWE-20: Improper Input Validation","type":"CWE"}]}],"providerMetadata":{"shortName":"siemens","orgId":"cec7a2ec-15b4-4faf-bd53-b40f371f3a77","dateUpdated":"2025-10-14T09:14:53.944Z"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-10-14T18:57:28.121550Z","id":"CVE-2011-20001","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-14T18:57:37.446Z"}}]}}}