---
title: "CVE-2026-73456: Arista EOS - Remote Code Execution"
description: "Arista EOS contains a remote code execution caused by crafted malicious requests in gRPC Network Packet Sampling Interface (gNPSI), letting unauthenticated attackers gain full administrative control, exploit requires gNPSI enabled."
url: https://panop.io/threat-heartbeat/CVE-2026-73456/
---

# CVE-2026-73456 Arista EOS - Remote Code Execution

Arista EOS contains a remote code execution caused by crafted malicious requests in gRPC Network Packet Sampling Interface (gNPSI), letting unauthenticated attackers gain full administrative control, exploit requires gNPSI enabled.

CVSS base score 10.0 /10

Critical

CISA KEV

Not listed

Public exploit

None known

EPSS

0.69% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-73456)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution, Privilege Escalation

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

Weakness

[CWE-94](https://cwe.mitre.org/data/definitions/94.html)

## Vendor fix

Update to the latest version of Arista EOS with the gNPSI vulnerability fixed.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-73456](https://nvd.nist.gov/vuln/detail/CVE-2026-73456)
- [https://www.arista.com/en/support/advisories-notices/security-advisory/24714-security-advisory-0158](https://www.arista.com/en/support/advisories-notices/security-advisory/24714-security-advisory-0158)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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