CVE-2026-20185

{
  "id": "CVE-2026-20185",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-06T17:16:21.050",
  "lastModified": "2026-10-26T19:10:00.163",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco 350 Series Managed Switches (SG350) and Cisco 350X Series Stackable Managed Switches (SG350X) firmware could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. \r\n\r\nThis vulnerability is due to improper error handling when parsing response data for a specific SNMP request. An attacker could exploit this vulnerability by sending a specific SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.\r\nThis vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMPv2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMPv3, the attacker must have valid SNMP user credentials for the affected system."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en el subsistema del Protocolo Simple de Gestión de Red (SNMP) del firmware de los switches gestionados Cisco serie 350 (SG350) y los switches gestionados apilables Cisco serie 350X (SG350X) podría permitir a un atacante remoto autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado.\n\nEsta vulnerabilidad se debe a un manejo de errores inadecuado al analizar los datos de respuesta para una solicitud SNMP específica. Un atacante podría explotar esta vulnerabilidad enviando una solicitud SNMP específica a un dispositivo afectado. Un exploit exitoso podría permitir al atacante hacer que el dispositivo se recargue inesperadamente, lo que resultaría en una condición de DoS.\nEsta vulnerabilidad afecta a las versiones 1, 2c y 3 de SNMP. Para explotar esta vulnerabilidad a través de SNMPv2c o anterior, el atacante debe conocer una cadena de comunidad SNMP válida de lectura-escritura o solo lectura para el sistema afectado. Para explotar esta vulnerabilidad a través de SNMPv3, el atacante debe tener credenciales de usuario SNMP válidas para el sistema afectado."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Cisco",
          "product": "Cisco Small Business Smart and Managed Switches",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "2.5.9.54",
              "status": "affected"
            },
            {
              "version": "2.5.9.55",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 4.0
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-06T17:36:31.829064Z",
          "id": "CVE-2026-20185",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sg350-snmp-dos-GEFZr2Tj",
      "source": "[email protected]"
    }
  ]
}