CVE-2024-6858

In Arista’s EOS when in 802.1X mode, multi-auth unauthenticated hosts might be allowed access to a switch port if there exists an EAPOL capable device in the fallback VLAN.

State: Published
Severity: 6.5 Medium
Published: Jun 4, 2026
Updated: Jun 5, 2026
Reserved: Jul 17, 2024

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Description

In Arista’s EOS when in 802.1X mode, multi-auth unauthenticated hosts might be allowed access to a switch port if there exists an EAPOL capable device in the fallback VLAN.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	CISA-ADP

Weaknesses

CWE-1287 Improper validation of specified type of input

Affected Products

Product	Versions
EOSArista Networks	4.31.0 through 4.31.1FAffected 4.30.0 through 4.30.5MAffected 4.29.0 through 4.29.7MAffected 4.28.10 through 4.28.10.1MAffected

References

https://www.arista.com/en/support/advisories-notices/security-advisory/19917-security-advisory-0103

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