CVE-2016-8562
A vulnerability has been identified in SIMATIC CP 1543-1 (All versions < V2.0.28), SIPLUS NET CP 1543-1 (All versions < V2.0.28). Under special conditions it was possible to write SNMP variables on port 161/udp which should be read-only and should only be configured with TIA-Portal. A write to these variables could reduce the availability or cause a denial-of-service.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 3.61%
- Percentil entre todas las CVEs puntuadas: 89
- 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).
CISA KEV — explotada activamente
- Añadida al catálogo: 3/3/2022
- Plazo de remediación: 24/3/2022
- Uso conocido en ransomware: Unknown
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1210Exploitation of Remote Serviceslateral movement85 % - Impacto principal
T1499.004Application or System Exploitationimpact75 % - Impacto secundario
T1565.001Stored Data Manipulationimpact70 %
Vulnerabilidad SNMP en dispositivo Siemens accesible por red (AV:N) que permite escritura no autorizada en variables protegidas (CWE implícito de validación), causando DoS o manipulación de configuración crítica.
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
Tecnologías afectadas (2)
CWE
- NVD-CWE-noinfo
Referencias
- http://www.securityfocus.com/bid/94436
- http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-672373.pdf
- https://ics-cert.us-cert.gov/advisories/ICSA-16-327-01
- http://www.securityfocus.com/bid/94436
- http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-672373.pdf
- https://ics-cert.us-cert.gov/advisories/ICSA-16-327-01
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-8562
JSON original (NVD)
Mostrar
{
"id": "CVE-2016-8562",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2016-8562",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "active"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2025-02-04T20:57:31.096194Z"
}
}
],
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 3.5,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:M/Au:S/C:N/I:N/A:P",
"authentication": "SINGLE",
"integrityImpact": "NONE",
"accessComplexity": "MEDIUM",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "NONE"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "LOW",
"obtainAllPrivilege": false,
"exploitabilityScore": 6.8,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1.6
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1.6
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2016-11-18T21:59:02.033",
"references": [
{
"url": "http://www.securityfocus.com/bid/94436",
"tags": [
"Broken Link",
"Third Party Advisory",
"VDB Entry"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdf",
"tags": [
"Broken Link",
"Patch",
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-672373.pdf",
"tags": [
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-16-327-01",
"tags": [
"Third Party Advisory",
"US Government Resource"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.securityfocus.com/bid/94436",
"tags": [
"Broken Link",
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdf",
"tags": [
"Broken Link",
"Patch",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-672373.pdf",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-16-327-01",
"tags": [
"Third Party Advisory",
"US Government Resource"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-8562",
"tags": [
"US Government Resource"
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability has been identified in SIMATIC CP 1543-1 (All versions < V2.0.28), SIPLUS NET CP 1543-1 (All versions < V2.0.28). Under special conditions it was possible to write SNMP variables on port 161/udp which should be read-only and should only be configured with TIA-Portal. A write to these variables could reduce the availability or cause a denial-of-service."
},
{
"lang": "es",
"value": "Se ha identificado una vulnerabilidad en SIMATIC CP 1543-1 (Todas las versiones < V2.0.28), SIPLUS NET CP 1543-1 (Todas las versiones < V2.0.28). En condiciones especiales era posible escribir variables SNMP en el puerto 161/udp que deberían ser de sólo lectura y sólo deberían configurarse con TIA-Portal. Una escritura en estas variables podría reducir la disponibilidad o causar una denegación de servicio"
}
],
"lastModified": "2026-06-17T00:54:31.297",
"cisaActionDue": "2022-03-24",
"cisaExploitAdd": "2022-03-03",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:siemens:simatic_cp_1543-1_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F8CCE837-13AF-47FB-B4C8-7720F0876229",
"versionEndExcluding": "2.0.28"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:siemens:simatic_cp_1543-1:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "3FDE92FB-38C7-46E8-9208-BBD7872219D5"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:siemens:siplus_net_cp_1543-1_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DDDA7068-0640-4E8C-A917-DB41F6A9D66A",
"versionEndExcluding": "2.0.28"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:siemens:siplus_net_cp_1543-1:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "5D7AB0D5-FD3E-416A-975B-D212B3350433"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "cve@mitre.org",
"cisaRequiredAction": "Apply updates per vendor instructions.",
"cisaVulnerabilityName": "Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability"
}