CVE-2026-73447: Arista Networks Eos

Critical severity, CVSS 9.1. EPSS: 0.7% chance of exploitation in the next 30 days.

A privileged attacker can exploit certain operation to execute arbitrary commands with root privileges, leading to full device compromise. An authenticated user can exploit gRPC Network Security Interface (gNSI) Certz service on Arista EOS-based products to escalate privileges and execute arbitrary OS commands via a crafted Certz Rotate request. The Bootz service is also affected.

Affected products

• Arista Networks Eos: from 4.30.2F, before 4.31.0F (fixed in 4.31.0F); from 4.31.0F, before 4.32.0F (fixed in 4.32.0F); from 4.32.0F, before 4.33.0F (fixed in 4.33.0F); from 4.33.0F, up to and including 4.33.8M; from 4.34.0F, up to and including 4.34.7M; from 4.35.0F, up to and including 4.35.5M; …

Published 2026-09-16. Last modified 2026-09-17.