{"api_version":"1","generated_at":"2026-04-23T09:40:01+00:00","cve":"CVE-2021-39840","urls":{"html":"https://cve.report/CVE-2021-39840","api":"https://cve.report/api/cve/CVE-2021-39840.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-39840","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-39840"},"summary":{"title":"CVE-2021-39840","description":"Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability when processing AcroForms that could result in arbitrary code execution in the context of the current user. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.","state":"PUBLIC","assigner":"psirt@adobe.com","published_at":"2021-09-29 16:15:00","updated_at":"2023-11-07 03:37:00"},"problem_types":["CWE-416"],"metrics":[],"references":[{"url":"https://helpx.adobe.com/security/products/acrobat/apsb21-55.html","name":"https://helpx.adobe.com/security/products/acrobat/apsb21-55.html","refsource":"MISC","tags":[],"title":"Adobe Security Bulletin","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-39840","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39840","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"39840","vulnerable":"1","versionEndIncluding":"17.011.30199","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"adobe","cpe5":"acrobat","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"classic","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"39840","vulnerable":"1","versionEndIncluding":"20.004.30006","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"adobe","cpe5":"acrobat","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"classic","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"39840","vulnerable":"1","versionEndIncluding":"21.005.20058","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"adobe","cpe5":"acrobat_dc","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"continuous","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"39840","vulnerable":"1","versionEndIncluding":"21.005.20060","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"adobe","cpe5":"acrobat_dc","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"continuous","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"39840","vulnerable":"1","versionEndIncluding":"17.011.30199","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"adobe","cpe5":"acrobat_reader","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"classic","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"39840","vulnerable":"1","versionEndIncluding":"20.004.30006","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"adobe","cpe5":"acrobat_reader","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"classic","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"39840","vulnerable":"1","versionEndIncluding":"21.005.20058","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"adobe","cpe5":"acrobat_reader_dc","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"continuous","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"39840","vulnerable":"1","versionEndIncluding":"21.005.20060","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"adobe","cpe5":"acrobat_reader_dc","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"continuous","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"39840","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"apple","cpe5":"macos","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"39840","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2021-39840","qid":"375845","title":"Adobe Security Update for Adobe Acrobat and Adobe Reader (APSB21-55)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"psirt@adobe.com","DATE_PUBLIC":"2021-09-14T23:00:00.000Z","ID":"CVE-2021-39840","STATE":"PUBLIC","TITLE":"Adobe Acrobat Reader DC AcroForm Field Use-After-Free Remote Code Execution Vulnerability"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Acrobat Reader","version":{"version_data":[{"version_affected":"<=","version_value":"DC 2021 July"},{"version_affected":"<=","version_value":"20.0-Classic 2021 July"},{"version_affected":"<=","version_value":"17.0-Classic 2021 July"},{"version_affected":"<=","version_value":"None"}]}}]},"vendor_name":"Adobe"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability when processing AcroForms that could result in arbitrary code execution in the context of the current user. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file."}]},"impact":{"cvss":{"attackComplexity":"Low","attackVector":"Local","availabilityImpact":"High","baseScore":7.8,"baseSeverity":"High","confidentialityImpact":"High","integrityImpact":"High","privilegesRequired":"None","scope":"Unchanged","userInteraction":"Required","vectorString":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Use After Free (CWE-416)"}]}]},"references":{"reference_data":[{"refsource":"MISC","url":"https://helpx.adobe.com/security/products/acrobat/apsb21-55.html","name":"https://helpx.adobe.com/security/products/acrobat/apsb21-55.html"}]},"source":{"discovery":"EXTERNAL"}},"nvd":{"publishedDate":"2021-09-29 16:15:00","lastModifiedDate":"2023-11-07 03:37:00","problem_types":["CWE-416"],"metrics":{"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:P/A:P","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":6.8},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*","versionStartIncluding":"20.001.30005","versionEndIncluding":"20.004.30006","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*","versionStartIncluding":"20.001.30005","versionEndIncluding":"20.004.30006","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":false,"cpe23Uri":"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*","versionStartIncluding":"15.008.20082","versionEndIncluding":"21.005.20058","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*","versionStartIncluding":"15.008.20082","versionEndIncluding":"21.005.20058","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*","versionStartIncluding":"15.008.20082","versionEndIncluding":"21.005.20060","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*","versionStartIncluding":"15.008.20082","versionEndIncluding":"21.005.20060","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*","versionStartIncluding":"17.011.30059","versionEndIncluding":"17.011.30199","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*","versionStartIncluding":"17.011.30059","versionEndIncluding":"17.011.30199","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":false,"cpe23Uri":"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"39840","Ordinal":"215546","Title":"CVE-2021-39840","CVE":"CVE-2021-39840","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"39840","Ordinal":"1","NoteData":"Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability when processing AcroForms that could result in arbitrary code execution in the context of the current user. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"39840","Ordinal":"2","NoteData":"2021-09-29","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"39840","Ordinal":"3","NoteData":"2021-09-29","Type":"Other","Title":"Modified"}]}}}