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VulnerabilityPublished

CVE-2024-6858: Arista Networks EOS · Improper validation of specified type of input

Affects Arista Networks EOSSource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Arista NetworksEOSAffected
  • >=4.31.0 <=4.31.1F
  • >=4.30.0 <=4.30.5M
  • >=4.29.0 <=4.29.7M
  • >=4.28.10 <=4.28.10.1M
Fixed in–

AI-suggested

Until an official fix is released, administrators should carefully review 802.1X and fallback VLAN configurations to minimize exposure. No official remediation or temporary fix has been provided by Arista Networks as of the current information.

Description

CVE-2024-6858 is a medium severity vulnerability in Arista Networks EOS affecting versions 4.28.10, 4.29.0, 4.30.0, and 4.31.0. When operating in 802.1X mode, multi-authentication unauthenticated hosts might gain access to a switch port if an EAPOL capable device exists in the fallback VLAN. This improper validation of input type could lead to unauthorized network access. No official patch or remediation guidance has been provided yet.

References

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