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CVE-2023-5502

Status: Awaiting AnalysisHigh (8.2)—

On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, and routing enabled on the access VLAN of the ports, a malicious supplicant may be able to bypass the requirement to perform 802.1x authentication.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Bypass de autenticación 802.1x en dispositivos Arista EOS accesibles en red sin privilegios previos (AV:N, PR:N). El atacante malintencionado elude la validación de credenciales (CWE-287) para obtener acceso a la red.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account ManagementApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser TrainingUser Account Management

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Arista — EOSAI

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2023-5502",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-5502",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-05T18:30:41.122247Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "psirt@arista.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.9,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.2
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "psirt@arista.com",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 8.2,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@arista.com",
      "affectedData": [
        {
          "vendor": "Arista Networks",
          "product": "EOS",
          "versions": [
            {
              "status": "affected",
              "version": "4.31.0",
              "versionType": "custom",
              "lessThanOrEqual": "4.31.0F"
            },
            {
              "status": "affected",
              "version": "4.30.0",
              "versionType": "custom",
              "lessThanOrEqual": "4.30.4M"
            },
            {
              "status": "affected",
              "version": "4.29.0",
              "versionType": "custom",
              "lessThanOrEqual": "4.29.6M"
            },
            {
              "status": "affected",
              "version": "4.28.0",
              "versionType": "custom",
              "lessThanOrEqual": "4.28.8M"
            },
            {
              "status": "affected",
              "version": "4.27.0",
              "versionType": "custom",
              "lessThanOrEqual": "4.27.11M"
            },
            {
              "status": "affected",
              "version": "4.26.0",
              "versionType": "custom",
              "lessThanOrEqual": "4.26.11M"
            },
            {
              "status": "affected",
              "version": "4.25.0",
              "versionType": "custom",
              "lessThanOrEqual": "4.25.11M"
            },
            {
              "status": "affected",
              "version": "4.24.0",
              "versionType": "custom",
              "lessThanOrEqual": "4.24.11M"
            }
          ],
          "platforms": [
            "7020R Series",
            "7280R/R2 Series",
            "7500R/R2 Series",
            "7280E Series",
            "7500E Series"
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-06-04T23:16:47.210",
  "references": [
    {
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/19462-security-advisory-0096",
      "source": "psirt@arista.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@arista.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, and routing enabled on the access VLAN of the ports, a malicious supplicant may be able to bypass the requirement to perform 802.1x authentication."
    },
    {
      "lang": "es",
      "value": "En plataformas afectadas que ejecutan Arista EOS con autenticación 802.1x configurada en los puertos de acceso/troncal, y enrutamiento habilitado en la VLAN de acceso de los puertos, un suplicante malicioso podría ser capaz de eludir el requisito de realizar autenticación 802.1x."
    }
  ],
  "lastModified": "2026-07-22T20:10:00.127",
  "sourceIdentifier": "psirt@arista.com"
}