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.

Project Subscriptions

Vendors Products
Advisories

No advisories yet.

Fixes

Solution

The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. For more information about upgrading see EOS User Manual: Upgrades and Downgrades https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades CVE-2023-5502 has been fixed in the following releases: * 4.32.0F and later releases in the 4.32.x train * 4.31.3M and later releases in the 4.31.x train * 4.30.5M and later releases in the 4.30.x train * 4.29.7M and later releases in the 4.29.x train Note: Products 7280E and 7500E are EOL, and there are no released versions of EOS which fix the issue on those platforms.


Workaround

Mitigation of this vulnerability requires disabling dot1x. Dot1x can be disabled globally using the following command: no dot1x system-auth-control

History

Fri, 05 Jun 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 05 Jun 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Arista
Arista eos
Vendors & Products Arista
Arista eos

Thu, 04 Jun 2026 22:45:00 +0000

Type Values Removed Values Added
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.
Title On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, a malicious supplicant may bypass authentication.
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: Arista

Published:

Updated: 2026-06-05T18:30:54.241Z

Reserved: 2023-10-10T15:58:04.589Z

Link: CVE-2023-5502

cve-icon Vulnrichment

Updated: 2026-06-05T18:30:50.610Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-06-04T23:16:47.210

Modified: 2026-06-05T15:02:34.977

Link: CVE-2023-5502

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-05T10:07:15Z

Weaknesses