CVE-2021-40113
Estado: ModificadaCrítica (9.8)—💥 PoC
Multiple vulnerabilities in the web-based management interface of the Cisco Catalyst Passive Optical Network (PON) Series Switches Optical Network Terminal (ONT) could allow an unauthenticated, remote attacker to perform the following actions: Log in with a default credential if the Telnet protocol is enabled Perform command injection Modify the configuration For more information about these vulnerabilities, see the Details section of this advisory.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 4.63%
- Percentil entre todas las CVEs puntuadas: 91
- 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).
💥 Exploits públicos
Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.
- Prueba de concepto en GitHub (no verificada) · Lista de pruebas de concepto en GitHub
⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.
Tecnologías afectadas (5)
CWE
- CWE-284
- CWE-78
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-40113",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-40113",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2024-11-07T21:53:09.304103Z"
}
}
],
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 7.5,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"authentication": "NONE",
"integrityImpact": "PARTIAL",
"accessComplexity": "LOW",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 6.4,
"baseSeverity": "HIGH",
"obtainAllPrivilege": false,
"exploitabilityScore": 10,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 10,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 6,
"exploitabilityScore": 3.9
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 9.8,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "psirt@cisco.com",
"affectedData": [
{
"vendor": "Cisco",
"product": "Cisco Catalyst PON Series",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2021-11-04T16:15:09.217",
"references": [
{
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-catpon-multivulns-CE3DSYGr",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "psirt@cisco.com"
},
{
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-catpon-multivulns-CE3DSYGr",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-284"
}
]
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-78"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Multiple vulnerabilities in the web-based management interface of the Cisco Catalyst Passive Optical Network (PON) Series Switches Optical Network Terminal (ONT) could allow an unauthenticated, remote attacker to perform the following actions: Log in with a default credential if the Telnet protocol is enabled Perform command injection Modify the configuration For more information about these vulnerabilities, see the Details section of this advisory."
},
{
"lang": "es",
"value": "Múltiples vulnerabilidades en la interfaz de administración basada en la web de los Switches de la serie Cisco Catalyst Passive Optical Network (PON) Optical Network Terminal (ONT) podrían permitir a un atacante remoto no autenticado llevar a cabo las siguientes acciones: Iniciar sesión con una credencial predeterminada si el protocolo Telnet está habilitado Llevar a cabo una inyección de comandos Modificar la configuración Para más información sobre estas vulnerabilidades, consulte la sección Detalles de este aviso"
}
],
"lastModified": "2026-06-17T04:06:32.647",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-1p_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1B9EEF22-C9E1-4C81-8F72-0F2B30660521",
"versionEndExcluding": "1.1.1.14"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:catalyst_pon_switch_cgp-ont-1p:*:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "DB214FC0-B34D-4FA1-8F4B-B96F8B63CC82"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4p_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "814B8708-C19F-4B8A-8CE8-525D9B731E41",
"versionEndExcluding": "1.1.3.17"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:catalyst_pon_switch_cgp-ont-4p:*:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "5C93A086-8C83-4D7B-95C5-48B149B5FCCD"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4pvc_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8F9DF6DF-BF43-4774-88A9-7E444D0A3640",
"versionEndExcluding": "1.1.3.17"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:catalyst_pon_switch_cgp-ont-4pvc:*:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "40DD3457-5405-499A-AD3F-815D67E4EDFE"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4tvcw_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F69EB73A-BA1C-42FB-83B8-DFD89FC1E608",
"versionEndExcluding": "1.1.3.17"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:catalyst_pon_switch_cgp-ont-4tvcw:*:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "493703F6-F83E-48A9-A2E9-CB344A231C7E"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4pv_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2335D357-90FB-4899-99FA-03FDF68069E4",
"versionEndExcluding": "1.1.3.17"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:catalyst_pon_switch_cgp-ont-4pv:*:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "6CF670E1-3A18-47CA-83F8-B479C49E3A82"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "psirt@cisco.com"
}