{"cve":{"cve_id":"CVE-2026-7473","is_kev":true,"kev_date_added":"2026-06-09","kev_vendor_project":"Arista","kev_product":"Extensible Operating System","kev_vulnerability_name":"Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability","kev_short_description":"Arista Extensible Operating System (EOS) contains an incomplete comparison with missing factors vulnerability when the switch incorrectly decapsulate and forwards other unexpected tunneled packet with a destination IP matching its configured decapsulation IP.","kev_required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","kev_due_date":"2026-06-23","kev_known_ransomware":false,"kev_notes":"https://www.arista.com/en/support/advisories-notices/security-advisory/24005-security-advisory-0137 ; https://nvd.nist.gov/vuln/detail/CVE-2026-7473","kev_cwes":["CWE-1023"],"epss_score":0.00836,"epss_percentile":0.52954,"epss_as_of":"2026-06-23","description":"On affected platforms running Arista EOS where a tunnel decapsulation configuration—such as VXLAN (Virtual Extensible LAN), decap-groups, or a GRE (Generic Routing Encapsulation) tunnel interface—is present, the switch will incorrectly decapsulate and forward other unexpected tunneled packet with a destination IP matching its configured decapsulation IP. This occurs because the switch does not verify the tunnel protocol type, potentially leading to the unexpected processing of non-configured tunnel traffic.\n\n\n\nThis issue has been reported as being exploited in the wild.","published_at":"2026-06-05T16:22:47.989000Z","last_modified_at":null,"cvss_v3_score":5.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","cvss_v3_severity":"MEDIUM","cvss_v4_score":6.9,"cvss_v4_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N","cvss_v4_severity":"MEDIUM","ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-1023"],"nvd_references":["https://www.arista.com/en/support/advisories-notices/security-advisory/22872-security-advisory-0137"],"vuln_status":null,"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":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-28T23:31:05.603465Z"},"effective_severity":"MEDIUM","badges":["kev"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"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":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"N","value_label":"None"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"L","value_label":"Low"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"N","value_label":"None"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"N","value_label":"None"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"L","value_label":"Low"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"arista-networks","vendor_name":"Arista Networks","product_slug":"eos","product_name":"EOS","version_start":"4.36.0","version_start_inclusive":true,"version_end":"4.36.0","version_end_inclusive":true,"cpe23_uri":"cve5:arista-networks:eos:4.36.0:4.36.0"},{"vendor_slug":"arista-networks","vendor_name":"Arista Networks","product_slug":"eos","product_name":"EOS","version_start":"4.35.0","version_start_inclusive":true,"version_end":"4.35","version_end_inclusive":true,"cpe23_uri":"cve5:arista-networks:eos:4.35.0:4.35"},{"vendor_slug":"arista-networks","vendor_name":"Arista Networks","product_slug":"eos","product_name":"EOS","version_start":"4.34.0","version_start_inclusive":true,"version_end":"4.34","version_end_inclusive":true,"cpe23_uri":"cve5:arista-networks:eos:4.34.0:4.34"},{"vendor_slug":"arista-networks","vendor_name":"Arista Networks","product_slug":"eos","product_name":"EOS","version_start":"4.33.0","version_start_inclusive":true,"version_end":"4.33","version_end_inclusive":true,"cpe23_uri":"cve5:arista-networks:eos:4.33.0:4.33"},{"vendor_slug":"arista-networks","vendor_name":"Arista Networks","product_slug":"eos","product_name":"EOS","version_start":"4.32.0","version_start_inclusive":true,"version_end":"4.32","version_end_inclusive":true,"cpe23_uri":"cve5:arista-networks:eos:4.32.0:4.32"},{"vendor_slug":"arista-networks","vendor_name":"Arista Networks","product_slug":"eos","product_name":"EOS","version_start":"4.31.0","version_start_inclusive":true,"version_end":"4.31","version_end_inclusive":true,"cpe23_uri":"cve5:arista-networks:eos:4.31.0:4.31"},{"vendor_slug":"arista-networks","vendor_name":"Arista 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