{"api_version":"1","generated_at":"2026-05-02T13:12:43+00:00","cve":"CVE-2021-33719","urls":{"html":"https://cve.report/CVE-2021-33719","api":"https://cve.report/api/cve/CVE-2021-33719.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-33719","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-33719"},"summary":{"title":"CVE-2021-33719","description":"A vulnerability has been identified in SIPROTEC 5 relays with CPU variants CP050 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP100 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP300 (All versions < V8.80). 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Specially crafted packets sent to port 4443/tcp could cause a Denial-of-Service condition or potential remote code execution."}]},"references":{"reference_data":[{"refsource":"MISC","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-847986.pdf","name":"https://cert-portal.siemens.com/productcert/pdf/ssa-847986.pdf"}]}},"nvd":{"publishedDate":"2021-09-14 11:15:00","lastModifiedDate":"2021-12-16 18:25:00","problem_types":["CWE-120"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL"},"exploitabilityScore":3.9,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":7.5},"severity":"HIGH","exploitabilityScore":10,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp050:*:*:*:*:*:*:*:*","versionEndExcluding":"8.80","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp100:*:*:*:*:*:*:*:*","versionEndExcluding":"8.80","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp300:*:*:*:*:*:*:*:*","versionEndExcluding":"8.80","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"33719","Ordinal":"209125","Title":"CVE-2021-33719","CVE":"CVE-2021-33719","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"33719","Ordinal":"1","NoteData":"A vulnerability has been identified in SIPROTEC 5 relays with CPU variants CP050 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP100 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP300 (All versions < V8.80). Specially crafted packets sent to port 4443/tcp could cause a Denial-of-Service condition or potential remote code execution.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"33719","Ordinal":"2","NoteData":"2021-09-14","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"33719","Ordinal":"3","NoteData":"2021-10-12","Type":"Other","Title":"Modified"}]}}}