CVE-2026-73456

Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised switch.

Score

CVSS 3.1 10.0 Critical

Status

Awaiting Analysis - psirt@arista.com

Published

2026-09-16

Last modified

2026-09-17

Weaknesses

CWE-94

Affected products

• Eos (Arista Networks)

References

• https://www.arista.com/en/support/advisories-notices/security-advisory/24714-security-advisory-0158