{"api_version":"1","generated_at":"2026-07-24T19:05:03+00:00","cve":"CVE-2021-26621","urls":{"html":"https://cve.report/CVE-2021-26621","api":"https://cve.report/api/cve/CVE-2021-26621.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-26621","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-26621"},"summary":{"title":"CVE-2021-26621","description":"An Buffer Overflow vulnerability leading to remote code execution was discovered in MEX01. Remote attackers can use this vulnerability by using the property that the target program copies parameter values to memory through the strcpy() function.","state":"PUBLIC","assigner":"vuln@krcert.or.kr","published_at":"2022-03-25 19:15:00","updated_at":"2022-03-31 13:42:00"},"problem_types":["CWE-120"],"metrics":[],"references":[{"url":"https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66579","name":"https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66579","refsource":"MISC","tags":[],"title":"Security Advisory | KrCERT/CC - KISA 인터넷 보호나라&KrCERT","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-26621","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26621","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"26621","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"netu","cpe5":"mex01","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"26621","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"netu","cpe5":"mex01_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"vuln@krcert.or.kr","ID":"CVE-2021-26621","STATE":"PUBLIC","TITLE":"Netis Korea MEX01 Buffer overflow vulnerability"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"MEX01","version":{"version_data":[{"platform":"Windows, Mac OS and etc.","version_affected":"<=","version_value":"v1.9.18"}]}}]},"vendor_name":"NetU Corp."}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"An Buffer Overflow vulnerability leading to remote code execution was discovered in MEX01. Remote attackers can use this vulnerability by using the property that the target program copies parameter values to memory through the strcpy() function."}]},"generator":{"engine":"Vulnogram 0.0.9"},"impact":{"cvss":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-120 Buffer Overflow"}]}]},"references":{"reference_data":[{"refsource":"MISC","url":"https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66579","name":"https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66579"}]},"source":{"discovery":"UNKNOWN"}},"nvd":{"publishedDate":"2022-03-25 19:15:00","lastModifiedDate":"2022-03-31 13:42:00","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":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:netu:mex01_firmware:*:*:*:*:*:*:*:*","versionEndExcluding":"1.9.18","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:netu:mex01:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"26621","Ordinal":"201692","Title":"CVE-2021-26621","CVE":"CVE-2021-26621","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"26621","Ordinal":"1","NoteData":"** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.","Type":"Description","Title":null}]}}}