CVE-2026-73459 [HIGH] – On affected platforms running Arista EOS with IS-IS configured, an unauthenticated attacke

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.