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01 Record

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.

MediumPUBLISHEDCNA: Arista
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

02 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.

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.14% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 3.5% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-07-22.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-06-04 21:51Z4 MO AGO
Last updated
2026-06-05 20:13Z4 MO AGO
Reserved
2024-07-17
Assigning CNA
Arista
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weaknesses
  • CWE-1287Improper Validation of Specified Type of InputBase
Data version
5.2
Document digest
7239ae13f6d3d7c64860a8cce8937562a7144f80f234c1d0d0fbbd5746c24190

05 Affected products

VendorProductVersionsPlatforms
Arista NetworksEOS4.31.0 to 4.31.1F, 4.30.0 to 4.30.5M, 4.29.0 to 4.29.7M, 4.28.10 to 4.28.10.1M720D Series, 720XP/722XPM Series, 750X Series, 7010 Series, 7010X Series, 7020R Series, 7130 Series running EOS, 7150 Series, 7160 Series, 7170 Series, 7050X/X2/X3/X4 Series, 7060X/X2/X4/X5/X6 Series, 7250X Series, 7260X/X3 Series, 7280E/R/R2/R3 Series, 7300X/X3 Series, 7320X Series, 7358X4 Series, 7368X4 Series, 7388X5 Series, 7500E/R/R2/R3 Series, 7800R3 Series

06 References

07 Remediation

The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. For more information about upgrading see EOS User Manual: Upgrades and Downgrades https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades CVE-2024-6858 has been fixed in the following releases: * 4.31.2F and later releases in the 4.31.x train. * 4.30.6M and later releases in the 4.30.x train. * 4.29.8M and later releases in the 4.29.x train. * 4.28.11M and later releases in the 4.28.x train.