{"id":"CVE-2026-73469","title":"When specific platforms are using Arista EOS with a loose Unicast Reverse Path Forwarding (uRPF) configuration, certain traffic may not be subjected to the intended verification drop","summary":"When specific platforms are using Arista EOS with a loose Unicast Reverse Path Forwarding (uRPF) configuration, certain traffic may not be subjected to the intended verification drop. Consequently, traffic that should be dropped based on…","severity":"medium","cvss":5.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","cwe":["CWE-863"],"vendor":"Arista Networks","product":"EOS","affected":["EOS >= 4.35.0F <= 4.35.4M"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:08:50.420","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73469","references":[{"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24732-security-advisory-0176","label":"psirt@arista.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-16T13:41:28.008891Z"},"ingestedAt":"2026-09-16T10:53:53.921Z","epss":0.00294,"epssPercentile":0.222,"slug":"CVE-2026-73469","body":"## Overview\n\nWhen specific platforms are using Arista EOS with a loose Unicast Reverse Path Forwarding (uRPF) configuration, certain traffic may not be subjected to the intended verification drop. Consequently, traffic that should be dropped based on these routes could still be processed and forwarded by the device.\n\nThis issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":31.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}