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CVE-2025-20151

Estado: AnalizadaMedia (4.3)—

A vulnerability in the implementation of the Simple Network Management Protocol Version 3 (SNMPv3) feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to poll an affected device using SNMP, even if the device is configured to deny SNMP traffic from an unauthorized source or the SNMPv3 username is removed from the configuration.

This vulnerability exists because of the way that the SNMPv3 configuration is stored in the Cisco IOS Software and Cisco IOS XE Software startup configuration.

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An attacker could exploit this vulnerability by polling an affected device from a source address that should have been denied. A successful exploit could allow the attacker to perform SNMP operations from a source that should be denied. Note: The attacker has no control of the SNMPv3 configuration. To exploit this vulnerability, the attacker must have valid SNMPv3 user credentials. For more information, see the section of this advisory.

CVSS

Probabilidad de explotación (EPSS)

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).

Tecnologías afectadas (1)

Cisco — IOS XE Sd-wan

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-20151",
  "cveTags": [],
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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-05-07T18:56:21.184209Z"
        }
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
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        "exploitabilityScore": 2.8
      }
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  "published": "2025-05-07T18:15:37.007",
  "references": [
    {
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmpv3-qKEYvzsy",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@cisco.com"
    }
  ],
  "vulnStatus": "Analyzed",
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      "description": [
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      "value": "A vulnerability in the implementation of the Simple Network Management Protocol Version 3 (SNMPv3) feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to poll an affected device using SNMP, even if the device is configured to deny SNMP traffic from an unauthorized source or the SNMPv3 username is removed from the configuration.\r\n\r\nThis vulnerability exists because of the way that the SNMPv3 configuration is stored in the Cisco IOS Software and Cisco IOS XE Software startup configuration. An attacker could exploit this vulnerability by polling an affected device from a source address that should have been denied. A successful exploit could allow the attacker to perform SNMP operations from a source that should be denied.\r\nNote: The attacker has no control of the SNMPv3 configuration. To exploit this vulnerability, the attacker must have valid SNMPv3 user credentials.\r\nFor more information, see the  section of this advisory."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la implementación del Protocolo Simple de Administración de Redes Versión 3 (SNMPv3) de Cisco IOS Software y Cisco IOS XE Software podría permitir que un atacante remoto autenticado sondee un dispositivo afectado mediante SNMP, incluso si el dispositivo está configurado para denegar el tráfico SNMP de una fuente no autorizada o si el nombre de usuario SNMPv3 se ha eliminado de la configuración. Esta vulnerabilidad existe debido a la forma en que se almacena la configuración de SNMPv3 en la configuración de inicio de Cisco IOS Software y Cisco IOS XE Software. Un atacante podría explotar esta vulnerabilidad sondeando un dispositivo afectado desde una dirección de origen que debería haber sido denegada. Una explotación exitosa podría permitir al atacante realizar operaciones SNMP desde una fuente que debería haber sido denegada. Nota: El atacante no tiene control sobre la configuración de SNMPv3. Para explotar esta vulnerabilidad, el atacante debe tener credenciales de usuario SNMPv3 válidas. Para obtener más información, consulte la sección de este aviso."
    }
  ],
  "lastModified": "2026-06-17T08:40:48.007",
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}