Status: NEW | Advisory ID: CVE-2026-73446
| CVE | CVE-2026-73446 |
| CVSS Score / Version | 7.4 (High) / CVSS v3.1 |
| Updated | 2026-09-16 |
| CVSS Vector | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| CVSS Prose | attack vector is adjacent; attack complexity is low; privileges required is none; user interaction is none; scope is changed; confidentiality impact is none; integrity impact is none; availability impact is high. |
| Classified as | CWE-696 (Incorrect Behavior Order) |
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 adjacency. This may result in traffic disruption and loss of IP reachability for prefixes advertised through that adjacency. (NVD)
| Source | Reference |
|---|---|
| NVD | https://nvd.nist.gov/vuln/detail/CVE-2026-73446 |
| CVE | https://www.cve.org/CVERecord?id=CVE-2026-73446 |