{"id":"CVE-2026-73446","title":"On affected platforms running Arista EOS with IS-IS configured on a broadcast interface, an unauthenticated attacker can send a crafted IS-IS Hello Protocol Data Unit (PDU) that causes the device to tear down an established IS-IS adjacen…","summary":"On affected platforms running Arista EOS with IS-IS configured on a broadcast interface, an unauthenticated attacker can send a crafted IS-IS Hello Protocol Data Unit (PDU) that causes the device to tear down an established IS-IS adjacen…","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","cwe":["CWE-696"],"vendor":"Arista Networks","product":"EOS","affected":["EOS >= 4.36.0 <= 4.36.1F","EOS >= 4.35.0 <= 4.35.5M","EOS >= 4.34.0 <= 4.34.7.1M","EOS >= 4.33.0 <= 4.33.9M","EOS >= 4.32.0 < 4.33.0F","EOS >= 4.31.0 < 4.32.0F"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T20:17:26.997","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73446","references":[{"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/24716-security-advisory-0160","label":"psirt@arista.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-16T19:34:09.117613Z"},"ingestedAt":"2026-09-15T23:46:25.574Z","epss":0.00247,"epssPercentile":0.16327,"slug":"CVE-2026-73446","body":"## Overview\n\nOn affected platforms running Arista EOS with IS-IS configured on a broadcast interface, an unauthenticated attacker can send a crafted IS-IS Hello Protocol Data Unit (PDU) that causes the device to tear down an established IS-IS adjacency. This may result in traffic disruption and loss of IP reachability for prefixes advertised through that adjacency.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}