{"cve":{"cve_id":"CVE-2020-3306","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.01233,"epss_percentile":0.66785,"epss_as_of":"2026-08-26","description":"A vulnerability in the DHCP module of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to incorrect processing of certain DHCP packets. An attacker could exploit this vulnerability by sending a crafted DHCP packet to the affected device. A successful exploit could allow the attacker to cause a DoS condition on the affected device.","published_at":"2020-05-06T16:42:30.062000Z","last_modified_at":"2026-08-11T19:37:30.880000Z","cvss_v3_score":6.8,"cvss_v3_vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-400"],"nvd_references":["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dos-qk8cTGLz"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-08-13T20:20:23.063882Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"H","value_label":"High"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"cisco","vendor_name":"Cisco","product_slug":"adaptive-security-appliance","product_name":"adaptive_security_appliance","version_start":null,"version_start_inclusive":null,"version_end":"9.6.4.34","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:*"},{"vendor_slug":"cisco","vendor_name":"Cisco","product_slug":"adaptive-security-appliance-software","product_name":"adaptive_security_appliance_software","version_start":"9.7","version_start_inclusive":true,"version_end":"9.8.4.10","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*"},{"vendor_slug":"cisco","vendor_name":"Cisco","product_slug":"cisco-adaptive-security-appliance-asa-software","product_name":"Cisco Adaptive Security Appliance (ASA) Software","version_start":"n/a","version_start_inclusive":true,"version_end":"n/a","version_end_inclusive":true,"cpe23_uri":"cve5:cisco:cisco-adaptive-security-appliance-asa-software:n/a:n/a"},{"vendor_slug":"cisco","vendor_name":"Cisco","product_slug":"secure-firewall-threat-defense","product_name":"secure_firewall_threat_defense","version_start":null,"version_start_inclusive":null,"version_end":"6.3.0.5","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dos-qk8cTGLz","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2020-05-06T16:42:30.062000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:03:55.561700Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:03:55.561700Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:03:55.561700Z","label":"CVSS score revised","source":"cvelistv5"}]}