CVE-2024-6858
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Multi-Auth Bypass in Arista EOS 802.1X Mode

Publication date: 2026-06-04

Last updated on: 2026-06-05

Assigner: Arista Networks, Inc.

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.
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Meta Information
Published
2026-06-04
Last Modified
2026-06-05
Generated
2026-06-25
AI Q&A
2026-06-05
EPSS Evaluated
2026-06-24
NVD
CVE-2024-6858
EUVD
EUVD-2024-55610
Affected Vendors & Products
Currently, no data is known.
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-1287 The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.
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Executive Summary

This vulnerability occurs in Arista's EOS when operating in 802.1X mode. It allows multi-auth unauthenticated hosts to potentially gain access to a switch port if there is an EAPOL capable device present in the fallback VLAN.

Impact Analysis

The vulnerability could allow unauthorized devices to access network switch ports, potentially leading to unauthorized network access and exposure of network resources.

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