CVE-2023-5502

On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, a malicious supplicant may bypass authentication.

State: Published
Severity: 8.2 High
Published: Jun 4, 2026
Updated: Jun 5, 2026
Reserved: Oct 10, 2023

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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.

Scores

CVSS	Score	Vector	Source
4.0	8.2 High	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	Arista
3.1	5.9 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N	Arista

Weaknesses

CWE-287 Improper Authentication

Affected Products

Product	Versions
EOSArista Networks	4.31.0 through 4.31.0FAffected 4.30.0 through 4.30.4MAffected 4.29.0 through 4.29.6MAffected 4.28.0 through 4.28.8MAffected 4.27.0 through 4.27.11MAffected 4.26.0 through 4.26.11MAffected 4.25.0 through 4.25.11MAffected 4.24.0 through 4.24.11MAffected

References

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

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