{"cve":"CVE-2020-3111","nvd":{"published":"2020-02-05T18:15:10.783","modified":"2026-06-17T03:17:21.913","status":"Modified","description":"A vulnerability in the Cisco Discovery Protocol implementation for the Cisco IP Phone could allow an unauthenticated, adjacent attacker to remotely execute code with root privileges or cause a reload of an affected IP phone. The vulnerability is due to missing checks when processing Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a crafted Cisco Discovery Protocol packet to the targeted IP phone. 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 denial of service (DoS) condition. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-20"],"references":["http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-voip-phones-rce-dos","http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-voip-phones-rce-dos"],"products":["cisco:ip_conference_phone_7832_firmware","cisco:ip_conference_phone_7832_with_multiplatform_firmware","cisco:ip_conference_phone_8832_firmware","cisco:ip_conference_phone_8832_with_multiplatform_firmware","cisco:ip_phone_6821_firmware","cisco:ip_phone_6841_firmware","cisco:ip_phone_6851_firmware","cisco:ip_phone_6861_firmware","cisco:ip_phone_6871_firmware","cisco:ip_phone_7811_firmware","cisco:ip_phone_7811_with_multiplatform_firmware","cisco:ip_phone_7821_firmware","cisco:ip_phone_7821_with_multiplatform_firmware","cisco:ip_phone_7841_firmware","cisco:ip_phone_7841_with_multiplatform_firmware","cisco:ip_phone_7861_firmware","cisco:ip_phone_7861_with_multiplatform_firmware","cisco:ip_phone_8811_firmware","cisco:ip_phone_8811_with_multiplatform_firmware","cisco:ip_phone_8841_firmware","cisco:ip_phone_8841_with_multiplatform_firmware","cisco:ip_phone_8845_firmware","cisco:ip_phone_8845_with_multiplatform_firmware","cisco:ip_phone_8851_firmware","cisco:ip_phone_8851_with_multiplatform_firmware","cisco:ip_phone_8861_firmware","cisco:ip_phone_8861_with_multiplatform_firmware","cisco:ip_phone_8865_firmware","cisco:ip_phone_8865_with_multiplatform_firmware","cisco:unified_ip_conference_phone_8831_firmware","cisco:unified_ip_conference_phone_8831_for_third-party_call_control_firmware","cisco:wireless_ip_phone_8821-ex_firmware","cisco:wireless_ip_phone_8821_firmware"],"source":"nvd","synced_at":"2026-10-19T21:02:53.949909883+00:00"},"epss":{"cve":"CVE-2020-3111","score":0.03095,"percentile":0.87735,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}