{"schema":"threatline.record/2","record":{"id":"CVE-2021-21017","aliases":[],"summary":"Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability","details":"Acrobat Acrobat and Reader contain a heap-based buffer overflow vulnerability that could allow an unauthenticated attacker to achieve code execution in the context of the current user.","categories":["Applications & CMS"],"product":"Acrobat and Reader","vendor":"Adobe","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-21017","source_modified_at":"2025-10-21T23:35:28.186Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Acrobat Reader","vendor":"Adobe","versions":[{"lessThanOrEqual":"2020.013.20074","status":"affected","version":"unspecified","versionType":"custom"},{"lessThanOrEqual":"2020.001.30018","status":"affected","version":"unspecified","versionType":"custom"},{"lessThanOrEqual":"2017.011.30188","status":"affected","version":"unspecified","versionType":"custom"},{"lessThanOrEqual":"None","status":"affected","version":"unspecified","versionType":"custom"}],"defaultStatus":null}],"fixed_versions":[],"cvss":8.8,"severity":"High","kev":{"listed":true,"date_added":"2021-11-03","due_date":"2021-11-17","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.86326,"percentile":0.99736,"score_date":"2026-10-23"},"published_at":"2021-02-11T19:42:20.225Z","modified_at":"2025-10-21T23:35:28.186Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2021-21017","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:35:28.186Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-21017","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21017","source":"CISA KEV"},{"source":"CVE List","url":"https://helpx.adobe.com/security/products/acrobat/apsb21-09.html","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21017","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"no","technical_impact":"total","assessed_at":"2025-02-04T21:28:57.359205Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2025-10-21T23:35:28.186Z","content_hash":"e9cc85f978415168bf53660dca9b9f5be5a9442c9e1e557f6ba63711d0132f30"}}