CVE-2026-73459
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, 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.