CVE-2026-73446
HIGH
NVD
CVSS Score
7.4
Severity
HIGH
Published
Sep 16, 2026
Vendor
unknown
Description
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.