{"id":"CVE-2011-20001","aliases":["EUVD-2011-5262","GHSA-hfrj-93xv-cmrv"],"status":"published","title":"A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) (All...","description":"A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) (All versions \u003c V2.0.3), SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) (All versions \u003c 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.","severity":{"version":"4.0","score":8.7,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00468,"percentile":0.40983,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2025-10-14T09:14:53Z","modified":"2026-06-16T23:30:34Z","products":[{"vendor":"siemens","product":"simatic s7-1200 cpu v1 family (incl. siplus variants)"},{"vendor":"siemens","product":"simatic s7-1200 cpu v2 family (incl. siplus variants)"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-625789.html"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-20001"},{"url":"https://github.com/advisories/GHSA-hfrj-93xv-cmrv"}],"sources":{"cve":[{"id":"CVE-2011-20001","description":"A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) (All versions \u003c V2.0.3), SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) (All versions \u003c 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.","status":"published","published":"2025-10-14T09:14:53.944Z","modified":"2025-10-14T18:57:37.446Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:35:35.912488Z"}],"euvd":[{"id":"EUVD-2011-5262","description":"A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) (All versions \u003c V2.0.3), SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) (All versions \u003c 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.","status":"published","published":"2025-10-14T09:14:53Z","modified":"2025-10-14T18:57:37Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"updated_at":"2026-11-02T20:31:32.493073Z"}],"ghsa":[{"id":"GHSA-hfrj-93xv-cmrv","title":"A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) (All...","description":"A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) (All versions \u003c V2.0.3), SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) (All versions \u003c 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.","status":"published","published":"2025-10-14T12:31:30Z","modified":"2025-10-14T12:31:37Z","cvss":[{"version":"4.0","score":8.7,"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/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","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:03:57.454768Z"}],"nvd":[{"id":"CVE-2011-20001","description":"A vulnerability has been identified in SIMATIC S7-1200 CPU V1 family (incl. SIPLUS variants) (All versions \u003c V2.0.3), SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) (All versions \u003c 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.","status":"published","published":"2025-10-14T10:15:32.457Z","modified":"2026-06-16T23:30:34.56Z","cvss":[{"version":"4.0","score":8.7,"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/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","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:02:12.945371Z"}]}}