{"id":"CVE-2026-73459","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-73459","summary":"On affected platforms running Arista EOS with IS-IS configured, an unauthenticated attacker who can inject a specially crafted IS-IS LSP PDU can cause the legitimate LSP to be unexpectedly…","details":"On affected platforms running Arista EOS with IS-IS configured, an unauthenticated attacker who can inject a specially crafted IS-IS LSP PDU can cause the legitimate LSP to be unexpectedly purged from the IS-IS link-state database. This may result in traffic loss.","published":"2026-09-16T00:17:05.213","modified":"2026-09-16T00:17:05.213","cvss":{"score":7.4,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24716-security-advisory-0160"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T00:17:05.213"}}