CVE record · CVE-2026-7473

Arista EOS Unexpected Tunnel Protocol Decapsulation and Forwarding Bypass

CVSS 6.9 MediumCriticalIn CISA KEVEPSS 0.011 · 65th percentile

Critical, because:

In CISA’s KEV catalogue since 9 Jun 2026: it is known to be exploited.

Published by the CVE Program (CNA: Arista) at 5 Jun 2026, 16:22 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Arista Networks	EOS	affected 4.36.0 custom affected 4.35.0 to 4.35, inclusive custom affected 4.34.0 to 4.34, inclusive custom affected 4.33.0 to 4.33, inclusive custom affected 4.32.0 to 4.32, inclusive custom affected 4.31.0 to 4.31, inclusive custom affected 4.30 and earlier custom Other versions: affected

Identifiers: CVE-2026-7473
CNA: Arista
Weakness (CWE): CWE-1023
Tags: Arista Networks EOS
CWE-1023
Published: 5 Jun 2026
Updated: 7 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.8	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N	CNA (Arista)
6.9	Medium	4.0	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	CNA (Arista)Used for this record

CISA KEV Listed since 9 Jun 2026: known to be exploited.
EPSS 0.011, the 65th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 5 Jun 2026. New records show when each source confirmed them.

Sources

References from the CNA

www.arista.com/en/support/advisories-notices/security-advisory/22872-security-advisory-0137 vendor-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.