{"schema":"threatline.record/2","record":{"id":"CVE-2023-27992","aliases":[],"summary":"Zyxel Multiple NAS Devices Command Injection Vulnerability","details":"Multiple Zyxel network-attached storage (NAS) devices contain a pre-authentication command injection vulnerability that could allow an unauthenticated attacker to execute commands remotely via a crafted HTTP request.","categories":["Network & edge"],"product":"Multiple Network-Attached Storage (NAS) Devices","vendor":"Zyxel","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2023-27992","source_modified_at":"2025-10-21T23:05:45.675Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"NAS326 firmware","vendor":"Zyxel","versions":[{"status":"affected","version":"< V5.21(AAZF.14)C0"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2023-27992","source_modified_at":"2025-10-21T23:05:45.675Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"NAS540 firmware","vendor":"Zyxel","versions":[{"status":"affected","version":"< V5.21(AATB.11)C0"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2023-27992","source_modified_at":"2025-10-21T23:05:45.675Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"NAS542 firmware","vendor":"Zyxel","versions":[{"status":"affected","version":"< V5.21(ABAG.11)C0"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"date_added":"2023-06-23","due_date":"2023-07-14","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.82264,"percentile":0.9966,"score_date":"2026-10-23"},"published_at":"2023-06-19T11:42:41.774Z","modified_at":"2025-10-21T23:05:45.675Z","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-2023-27992","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:05:45.675Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2023-27992","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-pre-authentication-command-injection-vulnerability-in-nas-products","tags":["x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27992","source":"CISA KEV"},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27992","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2025-01-27T22:16:42.703923Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2025-10-21T23:05:45.675Z","content_hash":"32d6e25d75140d781e1f848b4260d220d8023d925ed0d046cac5aea0f2ae9360"}}