Arista EOS exposes unauthenticated code execution through P4Runtime and gNPSI

Arista published four security advisories for Arista EOS on September 9, including an unauthenticated RCE rated CVSS 10.0 via P4Runtime (CVE-2026-73453) and two code-execution flaws in the gNPSI telemetry interface. No active exploitation is documented yet, but patching must come before the control plane is ever exposed.