CVE-2023-5502
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Authentication Bypass in Arista EOS via 802.1x Misconfiguration

Publication date: 2026-06-04

Last updated on: 2026-06-04

Assigner: Arista Networks, Inc.

Description
On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, and routing enabled on the access VLAN of the ports, a malicious supplicant may be able to bypass the requirement to perform 802.1x authentication.
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Meta Information
Published
2026-06-04
Last Modified
2026-06-04
Generated
2026-06-25
AI Q&A
2026-06-05
EPSS Evaluated
2026-06-24
NVD
CVE-2023-5502
EUVD
EUVD-2023-60580
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
arista arista_eos *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
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Executive Summary

This vulnerability affects Arista EOS platforms that have 802.1x authentication configured on access or trunk ports, with routing enabled on the access VLAN of those ports. A malicious supplicant (an unauthorized device or user) may be able to bypass the requirement to perform 802.1x authentication, potentially gaining unauthorized network access.

Impact Analysis

The impact of this vulnerability is that an attacker could bypass 802.1x authentication controls, which are typically used to restrict network access to authorized devices only. This could allow unauthorized devices to connect to the network, potentially leading to unauthorized access, data interception, or other malicious activities.

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