{"id":"CVE-2026-7473","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-7473","summary":"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…","details":"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":"2026-06-05T16:22:47.989Z","modified":"2026-06-10T03:57:41.291Z","cvss":{"score":5.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N"},"epss":{"score":0.01108,"percentile":0.63652,"asOf":"2026-09-04"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://www.arista.com/en/support/advisories-notices/security-advisory/22872-security-advisory-0137"},{"type":"ADVISORY","url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24005-security-advisory-0137"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7473"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-06-10T03:57:41.291Z"}}