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.

MEDIUM
6.5
CVSS Score
Published: June 4, 2026 at 09:51 PM UTC
Updated: July 22, 2026 at 08:24 PM UTC
1 product affected across 1 vendorArista EOS

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.28.10 ≤ v ≤ 4.28.10.1M4.29.0 ≤ v ≤ 4.29.7M4.30.0 ≤ v ≤ 4.30.5M4.31.0 ≤ v ≤ 4.31.1F4.28.104.29.04.30.04.31.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-1287

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