CVE-2025-5089

Estado: Pendiente de análisisAlta (7.1)—

In a CVX cluster, an EOS switch connected to a CVX server is not resilient to certain malformed messages received from the connected CVX server. Similarly, the CVX server is not resilient to certain malformed messages received from the connected EOS switch. This leads to either a Sysdb agent crash on the EOS device causing a soft reset of the switch or agent crashes on the CVX server causing instability of the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to already have a high privilege access to the connected device to be able to send custom TCP packets. EOS switches that are not connected to a CVX server are not impacted.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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
Puntuación base: 7.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.24%
Percentil entre todas las CVEs puntuadas: 13
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement85 %
Impacto principalT1499.004 Application or System Exploitationimpact90 %

Acceso remoto con privilegios (PR:L) en red a servicios internos CVX/EOS. El atacante causa crash de agentes Sysdb/CVX (DoS) enviando paquetes TCP malformados tras autenticarse.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability Scanning Threat Intelligence Program Privileged Account Management Network Segmentation Filter Network Traffic Disable or Remove Feature or Program

Tecnologías afectadas (2)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Arista — CVX^AI Arista — EOS^AI

CWE

CWE-20

Referencias

https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126

JSON original (NVD)

Mostrar

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  "id": "CVE-2025-5089",
  "cveTags": [],
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        "ssvcData": {
          "id": "CVE-2025-5089",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-06-09T14:47:55.021277Z"
        }
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    "cvssMetricV31": [
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          "attackVector": "NETWORK",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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          "attackComplexity": "LOW",
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          "version": "4.0",
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          "Automatable": "NOT_DEFINED",
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          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "NOT_DEFINED",
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          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "HIGH",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
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          "modifiedAttackRequirements": "NOT_DEFINED",
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          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "affectedData": [
        {
          "vendor": "Arista Networks",
          "product": "EOS / CloudVision eXchange (CVX)",
          "versions": [
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              "version": "4.34.0F",
              "versionType": "custom",
              "lessThanOrEqual": "4.34.1F"
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            {
              "status": "affected",
              "version": "4.33.0M",
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              "status": "affected",
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              "version": "4.30.0",
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          ],
          "platforms": [
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            "virtual or physical appliance"
          ],
          "defaultStatus": "unaffected"
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      ]
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  ],
  "published": "2026-06-05T17:16:30.180",
  "references": [
    {
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126",
      "source": "psirt@arista.com"
    }
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      "source": "psirt@arista.com",
      "description": [
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          "value": "CWE-20"
        }
      ]
    }
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  "descriptions": [
    {
      "lang": "en",
      "value": "In a CVX cluster, an EOS switch connected to a CVX server is not resilient to certain malformed messages received from the connected CVX server. Similarly, the CVX server is not resilient to certain malformed messages received from the connected EOS switch. This leads to either a Sysdb agent crash on the EOS device causing a soft reset of the switch or agent crashes on the CVX server causing instability of the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to already have a high privilege access to the connected device to be able to send custom TCP packets. EOS switches that are not connected to a CVX server are not impacted."
    },
    {
      "lang": "es",
      "value": "En un clúster CVX, un switch EOS conectado a un servidor CVX no es resistente a ciertos mensajes malformados recibidos del servidor CVX conectado. De manera similar, el servidor CVX no es resistente a ciertos mensajes malformados recibidos del switch EOS conectado. Esto conduce a un fallo del agente Sysdb en el dispositivo EOS que causa un reinicio suave del switch o a fallos de agentes en el servidor CVX que causan inestabilidad del clúster CVX. Un atacante podría usar este comportamiento para crear un escenario de denegación de servicio (DoS). Tenga en cuenta que esto requeriría que el atacante ya tenga acceso de alto privilegio al dispositivo conectado para poder enviar paquetes TCP personalizados. Los switches EOS que no están conectados a un servidor CVX no se ven afectados."
    }
  ],
  "lastModified": "2026-09-30T21:10:00.190",
  "sourceIdentifier": "psirt@arista.com"
}