CVE-2026-73447

Critical

Description

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.

SeverityCritical

CVSS9.1

Exploit probability—

ProductEOS

PublishedSep 16, 2026

First seenSep 16, 2026

Weakness typeCWE-78OS command injection

How to fix

Update

Arista Networks EOS4.31.0F, 4.32.0F, 4.33.0F or later

Vendor advisories

arista.com/en/support/advisories-notices/security-advisory/24718-security-advisory-0162

Affected products

Product	Affected versions	Fixed in
Arista Networks EOS	4.30.2F ≤ v < 4.31.0F, 4.31.0F ≤ v < 4.32.0F, 4.32.0F ≤ v < 4.33.0F, 4.33.0F ≤ v ≤ 4.33.8M, 4.34.0F ≤ v ≤ 4.34.7M, 4.35.0F ≤ v ≤ 4.35.5M, 4.36.0F ≤ v ≤ 4.36.0.1F	4.31.0F, 4.32.0F, 4.33.0F

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