{"cve_id":"CVE-2020-3161","published":"2020-04-15T20:15:15.097000+00:00","last_modified":"2026-06-17T03:17:31.293000+00:00","vuln_status":"Analyzed","description":"A vulnerability in the web server for Cisco IP Phones could allow an unauthenticated, remote attacker to execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. The vulnerability is due to a lack of proper input validation of HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web server of a targeted device. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a DoS condition.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","base_score":9.8,"base_severity":"CRITICAL","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-20"],"in_kev":true,"kev_date_added":"2021-11-03","kev_ransomware":false,"epss_score":0.83855,"epss_percentile":0.9969,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T09:17:16.024437+00:00","first_seen":"2020-04-15T20:15:15.097000+00:00","kev_first_seen":"2021-11-03T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["cisco"],"products":["8831","8831_firmware","ip_phone_7811","ip_phone_7811_firmware","ip_phone_7821","ip_phone_7821_firmware","ip_phone_7841","ip_phone_7841_firmware","ip_phone_7861","ip_phone_7861_firmware","ip_phone_8811","ip_phone_8811_firmware","ip_phone_8821","ip_phone_8821-ex","ip_phone_8821-ex_firmware","ip_phone_8821_firmware","ip_phone_8841","ip_phone_8841_firmware","ip_phone_8845","ip_phone_8845_firmware","ip_phone_8851","ip_phone_8851_firmware","ip_phone_8861","ip_phone_8861_firmware","ip_phone_8865","ip_phone_8865_firmware"],"affected":[{"vendor":"cisco","product":"8831_firmware","ranges":["11.0\\(1\\)","10.3\\(1\\)es14","11.0\\(5\\)sr1"]},{"vendor":"cisco","product":"ip_phone_7811_firmware","ranges":["11.0\\(1\\)"]},{"vendor":"cisco","product":"ip_phone_7821_firmware","ranges":["11.0\\(1\\)"]},{"vendor":"cisco","product":"ip_phone_7841_firmware","ranges":["11.0\\(1\\)"]},{"vendor":"cisco","product":"ip_phone_7861_firmware","ranges":["11.0\\(1\\)"]},{"vendor":"cisco","product":"ip_phone_8811_firmware","ranges":["11.0\\(1\\)","11.0\\(5\\)sr1","10.3\\(1\\)es14"]},{"vendor":"cisco","product":"ip_phone_8821-ex_firmware","ranges":["11.0\\(1\\)","11.0\\(5\\)sr1","10.3\\(1\\)es14"]},{"vendor":"cisco","product":"ip_phone_8821_firmware","ranges":["11.0\\(5\\)sr1","11.0\\(1\\)","10.3\\(1\\)es14"]},{"vendor":"cisco","product":"ip_phone_8841_firmware","ranges":["10.3\\(1\\)es14","11.0\\(1\\)","11.0\\(5\\)sr1"]},{"vendor":"cisco","product":"ip_phone_8845_firmware","ranges":["11.0\\(5\\)sr1","10.3\\(1\\)es14","11.0\\(1\\)"]},{"vendor":"cisco","product":"ip_phone_8851_firmware","ranges":["11.0\\(5\\)sr1","11.0\\(1\\)","10.3\\(1\\)es14"]},{"vendor":"cisco","product":"ip_phone_8861_firmware","ranges":["10.3\\(1\\)es14","11.0\\(5\\)sr1","11.0\\(1\\)"]},{"vendor":"cisco","product":"ip_phone_8865_firmware","ranges":["11.0\\(1\\)","11.0\\(5\\)sr1","10.3\\(1\\)es14"]}]}