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Vulnerability record · CVE-2023-5502 · published 4 June 2026

CVE-2023-5502: Improper authentication vulnerability

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.

8.2 CVSS 4.0 High EPSS 0.32% · top 77.8% CWE-287 · Improper authentication Awaiting Analysis
8.2CVSS 4.0 base score
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
22 Jul 2026Last modified by NVD

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.

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/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:

References

LinkTags
https://www.arista.com/en/support/advisories-notices/security-advisory/19462-security-advisory-0096

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Source: NIST National Vulnerability Database (record CVE-2023-5502), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.