CVE-2026-7473

Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability

Actively exploited (CISA KEV) Medium 6.9 CVSS 4.0

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.

Description as published by the source, in English.

Key facts

Published: 2026-06-05
Last modified: 2026-06-17
Assigned by: psirt@arista.com
CVSS vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:
Scored by: psirt@arista.com
Probability of exploitation: 1.1 % higher than 63 % of all known vulnerabilities
EPSS, next 30 days, model v2026.06.15
Fix available: Not registered in the sources

Actively exploited

CISA added this vulnerability to the Known Exploited Vulnerabilities catalogue on 2026-06-09, with a remediation deadline of 2026-06-23 for US federal agencies.

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

Vendor	Product	Versions	Status
Arista	7020sr-24c2	all versions listed	Not affected
Arista	7020sr-32c2	all versions listed	Not affected
Arista	7020srg-24c2	all versions listed	Not affected
Arista	7020tr-48	all versions listed	Not affected
Arista	7020tra-48	all versions listed	Not affected
Arista	7280cr-48	all versions listed	Not affected
Arista	7280cr2-60	all versions listed	Not affected
Arista	7280cr2a-30	all versions listed	Not affected
Arista	7280cr2a-60	all versions listed	Not affected
Arista	7280cr2k-30	all versions listed	Not affected
Arista	7280cr2k-60	all versions listed	Not affected
Arista	7280cr2m-30	all versions listed	Not affected
Arista	7280cr3-32d4	all versions listed	Not affected
Arista	7280cr3-32p4	all versions listed	Not affected
Arista	7280cr3-36s	all versions listed	Not affected
Arista	7280cr3-96	all versions listed	Not affected
Arista	7280cr3a-24d12	all versions listed	Not affected
Arista	7280cr3a-48d6	all versions listed	Not affected
Arista	7280cr3a-72	all versions listed	Not affected
Arista	7280cr3ak-24d12	all versions listed	Not affected
Arista	7280cr3ak-48d6	all versions listed	Not affected
Arista	7280cr3ak-72	all versions listed	Not affected
Arista	7280cr3am-24d12	all versions listed	Not affected
Arista	7280cr3am-48d6	all versions listed	Not affected
Arista	7280cr3am-72	all versions listed	Not affected
Arista	7280cr3mk-32d4s	all versions listed	Not affected
Arista	7280cr3mk-32p4s	all versions listed	Not affected
Arista	7280dr3-24	all versions listed	Not affected
Arista	7280dr3a-36	all versions listed	Not affected
Arista	7280dr3a-54	all versions listed	Not affected
Arista	7280dr3ak-36	all versions listed	Not affected
Arista	7280dr3ak-54	all versions listed	Not affected
Arista	7280dr3am-36	all versions listed	Not affected
Arista	7280dr3am-54	all versions listed	Not affected
Arista	7280pr3-24	all versions listed	Not affected
Arista	7280qr-c36	all versions listed	Not affected
Arista	7280qr-c36-m	all versions listed	Not affected
Arista	7280qr-c72	all versions listed	Not affected
Arista	7280qra-c36s	all versions listed	Not affected
Arista	7280qra-c36sm	all versions listed	Not affected
Arista	7280sr-48c6	all versions listed	Not affected
Arista	7280sr2-48yc6	all versions listed	Not affected
Arista	7280sr2-48yc6-m	all versions listed	Not affected
Arista	7280sr2a-48yc6	all versions listed	Not affected
Arista	7280sr2a-48yc6-m	all versions listed	Not affected
Arista	7280sr2k-48c6-m	all versions listed	Not affected
Arista	7280sr3-40yc6	all versions listed	Not affected
Arista	7280sr3-48yc8	all versions listed	Not affected
Arista	7280sr3m-48yc8	all versions listed	Not affected
Arista	7280sra-48c6	all versions listed	Not affected
Arista	7280sra-48c6-m	all versions listed	Not affected
Arista	7280sram-48c6	all versions listed	Not affected
Arista	7280srm-40cx2	all versions listed	Not affected
Arista	7280tr-48c6	all versions listed	Not affected
Arista	7280tr3-40c6	all versions listed	Not affected
Arista	7280tra-48c6	all versions listed	Not affected
Arista	7280tra-48c6-m	all versions listed	Not affected
Arista	7289r3a-sc	all versions listed	Not affected
Arista	7289r3ak-sc	all versions listed	Not affected
Arista	7289r3am-sc	all versions listed	Not affected

Weakness type

CWE-1023: Incomplete Comparison with Missing Factors
The product performs a comparison between entities that must consider multiple factors or characteristics of each entity, but the comparison does not include one or more of these factors.

References

https://www.arista.com/en/support/advisories-notices/security-advisory/22872-security-adv… Broken Link
https://www.arista.com/en/support/advisories-notices/security-advisory/24005-security-adv… Mitigation, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7473 US Government Resource

Does this affect you?

A vulnerability matters only if you run the product, in an affected version, somewhere an attacker can reach.

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Sources and freshness

CVE

What it is: A reference number naming one specific vulnerability, for example CVE-2024-9474.
What it tells you: Which vulnerability we are talking about, and in which product.
What it does NOT tell you: Nothing about how serious it is, whether anyone is exploiting it, or whether it concerns you.
Why it matters: Without a shared number, vendor, authority and tooling cannot discuss the same flaw.
Used with the others: The number is the key. NVD, KEV and EPSS all describe the same CVE.

NVD CWE CISA KEV EPSS

How to read this together

No single value should be used on its own. A high CVSS score does not mean a vulnerability is being exploited, and a low one does not mean it is harmless. The four sources answer four different questions.

CVE names the specific vulnerability.
NVD adds severity and technical detail about it.
CWE describes the type of mistake behind it.
CISA KEV shows that it is already being exploited.
EPSS estimates how likely exploitation is soon.

The order that decides what is urgent

Do you actually have the product?
Is the version you run affected?
Is it listed in CISA KEV?
Does it have a high EPSS score?
Is the system reachable from the internet or from others?
How important is the system to the business?
Are there compensating controls already in place?

The first two questions are not about the vulnerability at all. They are about you, and they remove most of the list before you start.

A short example

Fix this week

CVSS 6,5 (medium)

In CISA KEV: yes
EPSS: 94 per cent
A firewall facing the internet

Can be scheduled

CVSS 9,8 (critical)

In CISA KEV: no
EPSS: 0,04 per cent
A test server with no internet access

Sorted by CVSS alone, the one on the right comes first. It is the more serious flaw in theory. But the one on the left is being used against real organisations right now, and it sits where an attacker can reach it. That is the one to fix first.

The critical one still has to be fixed. It just does not have to be fixed today.

This product uses the NVD API but is not endorsed or certified by the NVD. CVE and the CVE logo are registered trademarks of The MITRE Corporation; CVE records are used under the CVE Terms of Use. CWE is a trademark of The MITRE Corporation, used per the CWE Terms of Use. KEV data from CISA (CC0). Exploitation probability from EPSS, a FIRST.org project. Open-source package data from OSV and the GitHub Advisory Database (CC-BY 4.0).

Scores and vectors are shown as published by the sources. The ordering of results is Berigo's own editorial assessment, described on the search page, and is not NVD data. An empty result never means a system is safe.