{"id":"CVE-2026-73451","title":"On affected platforms running Arista EOS with dual switch cards and with ingress Security ACLs configured on Switched Virtual Interfaces (SVI) in shared mode, restarting of the secondary switchcard forwarding agent or insertion of second…","summary":"On affected platforms running Arista EOS with dual switch cards and with ingress Security ACLs configured on Switched Virtual Interfaces (SVI) in shared mode, restarting of the secondary switchcard forwarding agent or insertion of second…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-1419"],"vendor":"Arista Networks","product":"EOS","affected":["EOS >= 4.36.0 <= 4.36.0.1F","EOS >= 4.35.0 <= 4.35.4M","EOS >= 4.34.0 <= 4.34.6M","EOS >= 4.33.0 <= 4.33.8M","EOS >= 4.32.0 <= 4.32.11M","EOS >= 4.31.1F <= 4.31.10M"],"published":"2026-09-15","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:08:50.420","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73451","references":[{"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24707-security-advisory-0151","label":"psirt@arista.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T19:24:36.704643Z"},"ingestedAt":"2026-09-15T18:41:59.182Z","epss":0.00177,"epssPercentile":0.07511,"slug":"CVE-2026-73451","body":"## Overview\n\nOn affected platforms running Arista EOS with dual switch cards and with ingress Security ACLs configured on Switched Virtual Interfaces (SVI) in shared mode, restarting of the secondary switchcard forwarding agent or insertion of secondary switchcard, can cause security ACLs on shared SVIs to stop functioning. This may result in incorrect packet permit/deny behavior.\n\nThis issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}