{"schema":"threatline.record/2","record":{"id":"CVE-2021-20123","aliases":[],"summary":"Draytek VigorConnect Path Traversal Vulnerability ","details":"Draytek VigorConnect contains a path traversal vulnerability in the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges. ","categories":["Network & edge"],"product":"VigorConnect","vendor":"DrayTek","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-20123","source_modified_at":"2025-10-21T23:25:28.693Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Draytek VigorConnect","vendor":"n/a","versions":[{"status":"affected","version":"1.6.0-B3"}],"defaultStatus":null}],"fixed_versions":[],"cvss":7.5,"severity":"High","kev":{"listed":true,"date_added":"2024-09-03","due_date":"2024-09-24","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.90234,"percentile":0.99801,"score_date":"2026-10-23"},"published_at":"2021-10-13T15:47:58.000Z","modified_at":"2025-10-21T23:25:28.693Z","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-2021-20123","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:25:28.693Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-20123.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-20123","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Nuclei","EPSS"],"references":[{"url":"https://www.draytek.com/about/security-advisory/vigorconnect-software-security-vulnerability-(cve-2021-20123-cve-2021-20129)","source":"CISA KEV"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20123","source":"CISA KEV"},{"source":"CVE List","url":"https://www.tenable.com/security/research/tra-2021-42","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20123","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"partial","assessed_at":"2024-09-03T12:29:01.834786Z"},"exploits":[{"source":"Nuclei","kind":"Scanner template","name":"Draytek VigorConnect 1.6.0-B - Local File Inclusion","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-20123.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"vendor and product","confidence":"heuristic","reviewed":false},"change_timestamp":"2025-10-21T23:25:28.693Z","content_hash":"f2b4288cb244abaa1264cb109e596f6e4004f6b25d261e17ba86d5b89c368f46"}}