CVE-2020-12521
Estado: ModificadaMedia (6.5)—
On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS a specially crafted LLDP packet may lead to a high system load in the PROFINET stack. An attacker can cause failure of system services or a complete reboot.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 6.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.46%
- Percentil entre todas las CVEs puntuadas: 38
- 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).
Tecnologías afectadas (1)
CWE
- CWE-20
- CWE-20
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2020-12521",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 6.1,
"accessVector": "ADJACENT_NETWORK",
"vectorString": "AV:A/AC:L/Au:N/C:N/I:N/A:C",
"authentication": "NONE",
"integrityImpact": "NONE",
"accessComplexity": "LOW",
"availabilityImpact": "COMPLETE",
"confidentialityImpact": "NONE"
},
"acInsufInfo": false,
"impactScore": 6.9,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 6.5,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "info@cert.vde.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 6.5,
"attackVector": "ADJACENT_NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 2.8
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 6.5,
"attackVector": "ADJACENT_NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 2.8
}
]
},
"affected": [
{
"source": "info@cert.vde.com",
"affectedData": [
{
"vendor": "Phoenix Contact",
"product": "AXC F 1152 (1151412)",
"versions": [
{
"status": "affected",
"version": "unspecified",
"lessThan": "2021.0 LTS",
"versionType": "custom"
}
]
},
{
"vendor": "Phoenix Contact",
"product": "AXC F 2152 (2404267)",
"versions": [
{
"status": "affected",
"version": "unspecified",
"lessThan": "2021.0 LTS",
"versionType": "custom"
}
]
},
{
"vendor": "Phoenix Contact",
"product": "AXC F 3152 (1069208)",
"versions": [
{
"status": "affected",
"version": "unspecified",
"lessThan": "2021.0 LTS",
"versionType": "custom"
}
]
},
{
"vendor": "Phoenix Contact",
"product": "RFC 4072S (1051328",
"versions": [
{
"status": "affected",
"version": "unspecified",
"lessThan": "2021.0 LTS",
"versionType": "custom"
}
]
},
{
"vendor": "Phoenix Contact",
"product": "AXC F 2152 Starterkit (1046568)",
"versions": [
{
"status": "affected",
"version": "unspecified",
"lessThan": "2021.0 LTS",
"versionType": "custom"
}
]
},
{
"vendor": "Phoenix Contact",
"product": "PLCnext Technology Starterkit (1188165)",
"versions": [
{
"status": "affected",
"version": "unspecified",
"lessThan": "2021.0 LTS",
"versionType": "custom"
}
]
}
]
}
],
"published": "2020-12-17T23:15:13.137",
"references": [
{
"url": "https://cert.vde.com/en-us/advisories/vde-2020-049",
"tags": [
"Third Party Advisory"
],
"source": "info@cert.vde.com"
},
{
"url": "https://cert.vde.com/en-us/advisories/vde-2020-049",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "info@cert.vde.com",
"description": [
{
"lang": "en",
"value": "CWE-20"
}
]
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-20"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS a specially crafted LLDP packet may lead to a high system load in the PROFINET stack. An attacker can cause failure of system services or a complete reboot."
},
{
"lang": "es",
"value": "En Phoenix Contact PLCnext Control Devices versiones anteriores a 2021.0 LTS, un paquete LLDP especialmente diseñado puede conllevar a una alta carga del sistema en la pila PROFINET. Un atacante puede causar un fallo en los servicios del sistema o un reinicio completo"
}
],
"lastModified": "2026-06-17T02:51:57.807",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:phoenixcontact:plcnext_firmware:*:*:*:*:long_term_support:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8233F8C3-5D10-4FD6-B192-39535B7B464C",
"versionEndExcluding": "2021.0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:phoenixcontact:axc_f_1152:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "A2474BD7-C447-4E07-A628-C729E376943D"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:phoenixcontact:plcnext_firmware:*:*:*:*:long_term_support:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8233F8C3-5D10-4FD6-B192-39535B7B464C",
"versionEndExcluding": "2021.0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:phoenixcontact:axc_f_2152:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "AE2E6118-6587-444A-A143-9C3A1E6ED4FD"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:phoenixcontact:plcnext_firmware:*:*:*:*:long_term_support:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8233F8C3-5D10-4FD6-B192-39535B7B464C",
"versionEndExcluding": "2021.0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:phoenixcontact:axc_f_3152:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "57424998-4EAB-4682-BFC4-1D2A621514F4"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:phoenixcontact:plcnext_firmware:*:*:*:*:long_term_support:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8233F8C3-5D10-4FD6-B192-39535B7B464C",
"versionEndExcluding": "2021.0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:phoenixcontact:rfc_4072s:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "0BF1EAD1-7C19-4A6E-BF87-EF3F7E526BD6"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:phoenixcontact:plcnext_firmware:*:*:*:*:long_term_support:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8233F8C3-5D10-4FD6-B192-39535B7B464C",
"versionEndExcluding": "2021.0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:phoenixcontact:axc_f_2152_starterkit:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "079A104B-2016-4830-80C1-3AB969106649"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:phoenixcontact:plcnext_firmware:*:*:*:*:long_term_support:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8233F8C3-5D10-4FD6-B192-39535B7B464C",
"versionEndExcluding": "2021.0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:phoenixcontact:plcnext_technology_starterkit:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "12BDD2FE-0D7C-4868-A5E4-B1004A5C217D"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "info@cert.vde.com"
}