How severe is CVE-2024-6858?

CVE-2024-6858 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2024-6858 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2024-6858?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-6858 have an EU (EUVD) identifier?

Yes. CVE-2024-6858 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-55610.

When was CVE-2024-6858 published?

CVE-2024-6858 was published on 2026-06-04 and last updated on 2026-06-17.

CVE-2024-6858

CVE-2024-6858 is a medium-severity vulnerability with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1287.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-55610
Weakness: CWE-1287
Published: 2026-06-04
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2024-6858?: CVE-2024-6858 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2024-6858 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2024-6858?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-6858 have an EU (EUVD) identifier?: Yes. CVE-2024-6858 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-55610.
When was CVE-2024-6858 published?: CVE-2024-6858 was published on 2026-06-04 and last updated on 2026-06-17.

References

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

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