CVE-2026-7473

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.011 · 66 %ileexploit · PoCDEEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 1 exploit · PoC

Likely / severe?

1.11% (66th) EPSS

CVSS 5.8 · medium

Is it mine?

10 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2026-06-09remediate by 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.

EPSS · scored 2026-10-27

Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability

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

Technical severity, 0–10. One row per scoring source.

6.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.8mediumAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · psirt@arista.comexploitability 3.9 · impact 1.4

v4.06.9mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:Nsecondary · ENISA EU

v4.06.9mediumCVSS: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:X/V:X/RE:X/U:Xsecondary · psirt@arista.com

v4.06.9mediumCVSS: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:A/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:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1023USCWE-1023US

exploits (1)

Public proof-of-concept and weaponised exploit code.

fevar54/CVE-2026-7473---Arista-EOS-Tunnel-Decapsulation-BypassPoC de CVE-2026-7473: bypass de decapsulacion de tunel en Arista EOS.PoC · poc_in_github

affected products (10)

Products and version ranges known to be affected.

Arista EOSall versionscert_bundDEcpe:/o:arista:arista_eos:-
Arista Networks EOS≤ 4.35.0 ≤4.35enisa_euvdEU
Arista Networks EOS≤ 4.33.0 ≤4.33enisa_euvdEU
Arista Networks EOS≤ 4.32.0 ≤4.32enisa_euvdEU
Arista Networks EOS≤ 4.31.0 ≤4.31enisa_euvdEU
Arista Networks EOS≤ 4.34.0 ≤4.34enisa_euvdEU
Arista Networks EOS≤ 4.36.0enisa_euvdEU
Arista Networks EOS≤ * ≤4.30enisa_euvdEU
Arista Networks, Inc. Arista EOS4.30 → 4.36.0Ffstec_bduRU
arista eosall versionsnvdUScpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1374Arista EOS: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2026-05-05csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Arista EOS ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2026-06-05modified 2026-10-25

references (5)

External citations — patches, advisories, analysis.

scry

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