CVE-2026-7473

Arista EOS Unexpected Tunnel Protocol Decapsulation and Forwarding Bypass

MEDIUM

5.8

CVSS Score

Published: June 5, 2026 at 04:22 PM UTC

Updated: October 25, 2026 at 11:10 PM UTC

2 products affected across 2 vendorsEosArista EOS· also runs on 101 platforms

Using EOS by Arista Networks?

Get instant alerts when new vulnerabilities affect EOS - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM5.8

Exploitation

CISA KEV

Exploit prediction

EPSS 1%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score1.1%

EPSS (Exploit Prediction Scoring System) estimates a 1.1% chance this CVE is exploited in the wild within the next 30 days — higher than 66% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Arista Extensible Operating System (EOS) contains an incomplete comparison with missing factors vulnerability when the switch incorrectly decapsulate and forwards other unexpected tunneled packet with a destination IP matching its configured decapsulation IP.

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.

Ransomware Use

Unknown

Added to KEV

Jun 9, 2026

Remediation Due

Jun 23, 2026

125 days overdue

Notes

https://www.arista.com/en/support/advisories-notices/security-advisory/24005-security-advisory-0137

https://nvd.nist.gov/vuln/detail/CVE-2026-7473

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Eos · Arista

95%

All versions

arista-7020sr-24c2 (environment) · arista-7020sr-32c2 (environment) · arista-7020srg-24c2 (environment) · arista-7020tr-48 (environment) · arista-7020tra-48 (environment) · arista-7280cr-48 (environment) · arista-7280cr2-60 (environment) · arista-7280cr2a-30 (environment) · arista-7280cr2a-60 (environment) · arista-7280cr2k-30 (environment) · arista-7280cr2k-60 (environment) · arista-7280cr2m-30 (environment) · arista-7280cr3-32d4 (environment) · arista-7280cr3-32p4 (environment) · arista-7280cr3-36s (environment) · arista-7280cr3-96 (environment) · arista-7280cr3a-24d12 (environment) · arista-7280cr3a-48d6 (environment) · arista-7280cr3a-72 (environment) · arista-7280cr3ak-24d12 (environment) · arista-7280cr3ak-48d6 (environment) · arista-7280cr3ak-72 (environment) · arista-7280cr3am-24d12 (environment) · arista-7280cr3am-48d6 (environment) · arista-7280cr3am-72 (environment) · arista-7280cr3mk-32d4s (environment) · arista-7280cr3mk-32p4s (environment) · arista-7280dr3-24 (environment) · arista-7280dr3a-36 (environment) · arista-7280dr3a-54 (environment) · arista-7280dr3ak-36 (environment) · arista-7280dr3ak-54 (environment) · arista-7280dr3am-36 (environment) · arista-7280dr3am-54 (environment) · arista-7280pr3-24 (environment) · arista-7280qr-c36 (environment) · arista-7280qr-c36-m (environment) · arista-7280qr-c72 (environment) · arista-7280qra-c36s (environment) · arista-7280qra-c36sm (environment) · arista-7280sr-48c6 (environment) · arista-7280sr2-48yc6 (environment) · arista-7280sr2-48yc6-m (environment) · arista-7280sr2a-48yc6 (environment) · arista-7280sr2a-48yc6-m (environment) · arista-7280sr2k-48c6-m (environment) · arista-7280sr3-40yc6 (environment) · arista-7280sr3-48yc8 (environment) · arista-7280sr3m-48yc8 (environment) · arista-7280sra-48c6 (environment) · arista-7280sra-48c6-m (environment) · arista-7280sram-48c6 (environment) · arista-7280srm-40cx2 (environment) · arista-7280tr-48c6 (environment) · arista-7280tr3-40c6 (environment) · arista-7280tra-48c6 (environment) · arista-7280tra-48c6-m (environment) · arista-7289r3a-sc (environment) · arista-7289r3ak-sc (environment) · arista-7289r3am-sc (environment) · arista-7500r-36cq-lc (environment) · arista-7500r-36q-lc (environment) · arista-7500r-48s2cq-lc (environment) · arista-7500r-8cfpx-lc (environment) · arista-7500r2-36cq-lc (environment) · arista-7500r2a-36cq-lc (environment) · arista-7500r2ak-36cq-lc (environment) · arista-7500r2ak-48ycq-lc (environment) · arista-7500r2am-36cq-lc (environment) · arista-7500r2m-36cq-lc (environment) · arista-7500r3-24d (environment) · arista-7500r3-24p (environment) · arista-7500r3-36cq (environment) · arista-7500r3k-36cq (environment) · arista-7500r3k-48y4d (environment) · arista-7500rm-36cq-lc (environment) · arista-7504r-fm (environment) · arista-7504r3 (environment) · arista-7508r-fm (environment) · arista-7508r3 (environment) · arista-7512r-fm (environment) · arista-7512r3 (environment) · arista-7516-sup2 (environment) · arista-7516n-ch (environment) · arista-7516r-fm (environment) · arista-7800r3-36d (environment) · arista-7800r3-48cq (environment) · arista-7800r3a-36d (environment) · arista-7800r3a-36dm (environment) · arista-7800r3a-36p (environment) · arista-7800r3a-36pm (environment) · arista-7800r3ak-36dm (environment) · arista-7800r3ak-36pm (environment) · arista-7800r3k-48cq (environment) · arista-7800r3k-48cqms (environment) · arista-7800r3k-72y (environment) · arista-7804r3 (environment) · arista-7808r3 (environment) · arista-7812r3 (environment) · arista-7816lr3 (environment) · arista-7816r3 (environment)

Arista EOS · Arista Networks

90%

v ≤ 4.30v ≤ 4.31v ≤ 4.32v ≤ 4.33v ≤ 4.34v ≤ 4.354.31.0 4.32.0 4.33.0 4.34.0 4.35.0 4.36.0