CVE-2026-73456 — CRITICAL (10.0)

Vulnerability Description

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.

CVSS Score

10.0

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-94

References

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

FAQ

What is CVE-2026-73456?

CVE-2026-73456 is a vulnerability with a CVSS score of 10.0 (CRITICAL). 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...

How severe is CVE-2026-73456?

CVE-2026-73456 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-73456?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.