Which products and versions are affected by CVE-2026-7473?

Affected: EOS (Arista) versions >= 4.36.0. The full list is in the CVE brief.

Is CVE-2026-7473 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 5, 2026.

Is CVE-2026-7473 in the CISA KEV catalog?

Yes. It was added on Jun 9, 2026 with a federal remediation due date of Jun 23, 2026.

Is there a public exploit for CVE-2026-7473?

Public exploit code is available.

Is there a fix for CVE-2026-7473?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2026-7473 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2026-7473

MediumExploitedPublic exploit

Published Jun 5, 2026 · Updated Oct 7, 2026 · Also known as EUVD-2026-34858, GHSA-mcx4-vm6v-r473

Key Facts

Patch immediately

CVE-2026-7473 is a medium-severity vulnerability (CVSS 6.9 v4) affecting EOS (Arista).
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 5, 2026. Public exploit code is available.
EPSS estimates a 0.6% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v4

6.9

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N

EPSS (30-day exploit likelihood)

0.6%

Higher than 50.0% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2026-7473 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Jun 9, 2026	Jun 23, 2026	Not reported
Industry KEV feed	May 5, 2026	Jun 23, 2026	Not reported
CIRCL KEV	Jun 5, 2026	Jun 23, 2026	Not reported
ENISA EUVD	Jun 9, 2026	n/a	Not reported

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.

Affected Products

3 affected entries in total

Product	Affected versions	Fixed in
EOSArista	>= 4.36.0	n/a

Timeline

Added to Industry KEV feed
May 5, 2026
Publicly disclosed
Jun 5, 2026
Added to CIRCL KEV
Jun 5, 2026
Added to CISA KEV
Jun 9, 2026
Added to ENISA EUVD
Jun 9, 2026
Last updated
Oct 7, 2026

Weakness Type

CWE-1023 Incomplete Comparison with Missing Factors

References

1 more references in the full CVE brief

FAQ

Common Questions.

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 matc…
Affected: EOS (Arista) versions >= 4.36.0. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 5, 2026.
Yes. It was added on Jun 9, 2026 with a federal remediation due date of Jun 23, 2026.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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