PT-2026-46983 · Arista Networks · Eos

Published 2026-06-05 · Updated 2026-06-05 · CVE-2026-7473

Mitre

CVSS v3.1

5.8

Medium

Base vector

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

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.

Fix

Weakness Enumeration

CWE-1023

Related Identifiers

CVE-2026-7473

Affected Products

Eos

References · 2

• https://arista.com/en/support/advisories-notices/security-advisory/22872-security-advisory-0137 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-7473 · Security Note