CVE-2026-7473

MEDIUM5.8

CISA KEV

Published 2026-06-05 · Updated 2026-06-17 · Source psirt@arista.com

Description

On affected platforms running Arista EOS where a tunnel decapsulation configuration—such as VXLAN (Virtual Extensible LAN), decap-groups, or a GRE (Generic Routing Encapsulation) tunnel interface—is present, the switch will incorrectly decapsulate and forward other unexpected tunneled packet with a destination IP matching its configured decapsulation IP. This occurs because the switch does not verify the tunnel protocol type, potentially leading to the unexpected processing of non-configured tunnel traffic. This issue has been reported as being exploited in the wild.

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

CWE-1023

CISA Known-Exploited Vulnerability

Product: Arista — Extensible Operating System

Name: Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability

Date added: 2026-06-09 · Due: 2026-06-23

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

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