{"api_version":"1","generated_at":"2026-07-24T00:33:42+00:00","cve":"CVE-2021-39392","urls":{"html":"https://cve.report/CVE-2021-39392","api":"https://cve.report/api/cve/CVE-2021-39392.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-39392","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-39392"},"summary":{"title":"CVE-2021-39392","description":"The management tool in MyLittleBackup up to and including 1.7 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2021-09-15 17:15:00","updated_at":"2021-10-07 17:55:00"},"problem_types":["CWE-502"],"metrics":[],"references":[{"url":"http://www.mylittlebackup.com/mlb/zip/mlb_1.7.zip","name":"http://www.mylittlebackup.com/mlb/zip/mlb_1.7.zip","refsource":"MISC","tags":[],"title":"","mime":"application/zip","httpstatus":"200","archivestatus":"404"},{"url":"https://gist.github.com/omriinbar/65827626e63f15e3e50557e2d9d61281","name":"https://gist.github.com/omriinbar/65827626e63f15e3e50557e2d9d61281","refsource":"MISC","tags":[],"title":"MyLittleBackup Vulnerability · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-39392","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39392","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"39392","vulnerable":"1","versionEndIncluding":"1.7","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mylittlebackup","cpe5":"mylittlebackup","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"39392","vulnerable":"1","versionEndIncluding":"1.7","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mylittletools","cpe5":"mylittlebackup","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":"cve@mitre.org","ID":"CVE-2021-39392","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"The management tool in MyLittleBackup up to and including 1.7 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"http://www.mylittlebackup.com/mlb/zip/mlb_1.7.zip","refsource":"MISC","name":"http://www.mylittlebackup.com/mlb/zip/mlb_1.7.zip"},{"refsource":"MISC","name":"https://gist.github.com/omriinbar/65827626e63f15e3e50557e2d9d61281","url":"https://gist.github.com/omriinbar/65827626e63f15e3e50557e2d9d61281"}]}},"nvd":{"publishedDate":"2021-09-15 17:15:00","lastModifiedDate":"2021-10-07 17:55:00","problem_types":["CWE-502"],"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:a:mylittletools:mylittlebackup:*:*:*:*:*:*:*:*","versionEndIncluding":"1.7","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"39392","Ordinal":"215096","Title":"CVE-2021-39392","CVE":"CVE-2021-39392","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"39392","Ordinal":"1","NoteData":"The management tool in MyLittleBackup up to and including 1.7 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"39392","Ordinal":"2","NoteData":"2021-09-15","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"39392","Ordinal":"3","NoteData":"2021-09-15","Type":"Other","Title":"Modified"}]}}}