{"id":"CVE-2026-7473","revision":"cbe74f092f2448a3b48a9905bca60fb1","records":[{"revision":"cbe74f092f2448a3b48a9905bca60fb1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-7473","aliases":[],"title":"Arista EOS Unexpected Tunnel Protocol Decapsulation and Forwarding Bypass","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.","state":0,"publishedAt":"2026-06-05T16:22:47.989+00:00","modifiedAt":"2026-10-07T18:27:31.678+00:00","affected":[{"ecosystem":"Vendor product","name":"EOS","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Arista Networks\",\n                    \"product\": \"EOS\",\n                    \"platforms\": [\n                        \"7020R Series\",\n                        \"7280R/R2 Series\",\n                        \"7500R/R2 Series\",\n                        \"7280R3 Series (Limited exposure: IP-in-IPv6 and GUEv6)\",\n                        \"7500R3 Series (Limited exposure: IP-in-IPv6 and GUEv6)\",\n                        \"7800R3 Series (Limited exposure: IP-in-IPv6 and GUEv6)\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.36.0\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.35.0\",\n                            \"lessThanOrEqual\": \"4.35\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.34.0\",\n                            \"lessThanOrEqual\": \"4.34\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.33.0\",\n                            \"lessThanOrEqual\": \"4.33\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.32.0\",\n                            \"lessThanOrEqual\": \"4.32\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.31.0\",\n                            \"lessThanOrEqual\": \"4.31\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"*\",\n                            \"lessThanOrEqual\": \"4.30\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"affected\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","score":5.8,"severity":"MEDIUM"},{"system":"CVSS 4.0","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","score":6.9,"severity":"MEDIUM"}],"references":["https://www.arista.com/en/support/advisories-notices/security-advisory/22872-security-advisory-0137"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-7473","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-7473","identifiers":["CVE-2026-7473"]},"retained":false,"historicalAffected":[]}],"coverage":[]}