{"schema":"threatline.record/2","record":{"id":"CVE-2021-20038","aliases":[],"summary":"SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability","details":"SonicWall SMA 100 devies are vulnerable to an unauthenticated stack-based buffer overflow vulnerability where exploitation can result in code execution.","categories":["Network & edge"],"product":"SMA 100 Appliances","vendor":"SonicWall","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-20038","source_modified_at":"2025-10-21T23:25:23.415Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"SonicWall SMA100","vendor":"SonicWall","versions":[{"status":"affected","version":"10.2.0.8-37sv and earlier"},{"status":"affected","version":"10.2.1.1-19sv and earlier"},{"status":"affected","version":"10.2.1.2-24sv and earlier"}],"defaultStatus":null}],"fixed_versions":[],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"date_added":"2022-01-28","due_date":"2022-02-11","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Known"},"epss":{"probability":0.99912,"percentile":0.99968,"score_date":"2026-10-23"},"published_at":"2021-12-08T09:55:20.000Z","modified_at":"2025-10-21T23:25:23.415Z","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-2021-20038","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:25:23.415Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-20038.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-2021-20038","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Nuclei","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20038","source":"CISA KEV"},{"source":"CVE List","url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026","tags":["x_refsource_CONFIRM","x_transferred"]},{"source":"CVE List","url":"https://github.com/jbaines-r7/badblood","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100-multiple-vulnerabilities-fixed-2/","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20038","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":"total","assessed_at":"2025-02-04T14:26:58.722403Z"},"exploits":[{"source":"Nuclei","kind":"Scanner template","name":"SonicWall SMA100 Stack - Buffer Overflow/Remote Code Execution","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-20038.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"vendor and product","confidence":"heuristic","reviewed":false},"change_timestamp":"2025-10-21T23:25:23.415Z","content_hash":"9c08073bca68a3dbc4c8ac29455466590b025f3d689672f1a6491a4566cda6c7"}}