CVE-2026-73459

HighCVSS 7.4/10Last modified Sep 16, 2026

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.

Metrics

CVSS 3.1 7.4/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Weakness enumeration

CWE-354

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

No affected versions have been published.

Timeline

Published: Sep 16, 2026
Last modified: Sep 16, 2026
NVD status: Awaiting Analysis

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