CVE-2021-33485
Estado: ModificadaCrítica (9.8)—
CODESYS Control Runtime system before 3.5.17.10 has a Heap-based Buffer Overflow.
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: 1.14%
- Percentil entre todas las CVEs puntuadas: 66
- 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 (7)
CWE
- CWE-787
- CWE-122
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-33485",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-33485",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-05-29T14:02:26.023609Z"
}
}
],
"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": "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
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"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": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2021-08-03T16:15:08.583",
"references": [
{
"url": "https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14805&token=f0b86f99bb302ddd4aadec483aed5f5d3fddbf1a&download=",
"tags": [
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14805&token=f0b86f99bb302ddd4aadec483aed5f5d3fddbf1a&download=",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
]
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-122"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "CODESYS Control Runtime system before 3.5.17.10 has a Heap-based Buffer Overflow."
},
{
"lang": "es",
"value": "CODESYS Control Runtime system versiones anteriores a 3.5.17.10, presenta un Desbordamiento de Buffer en la región Heap de la memoria"
}
],
"lastModified": "2026-06-17T03:54:39.427",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:codesys:control:*:*:*:*:*:beaglebone_sl:*:*",
"vulnerable": true,
"matchCriteriaId": "57DD6E2E-9B12-4C30-9CCF-26C5EFCFC0EA",
"versionEndExcluding": "4.2.0.0"
},
{
"criteria": "cpe:2.3:a:codesys:control:*:*:*:*:*:empc-a\\/imx6_sl:*:*",
"vulnerable": true,
"matchCriteriaId": "79E8DFCC-74F7-4B0D-A476-D13CBB32EDEF",
"versionEndExcluding": "4.2.0.0"
},
{
"criteria": "cpe:2.3:a:codesys:control:*:*:*:*:*:iot2000_sl:*:*",
"vulnerable": true,
"matchCriteriaId": "58160302-830A-463B-AE5F-782B01893F40",
"versionEndExcluding": "4.2.0.0"
},
{
"criteria": "cpe:2.3:a:codesys:control:*:*:*:*:*:linux_sl:*:*",
"vulnerable": true,
"matchCriteriaId": "2E740918-B35E-4583-8580-046A7C7F3113",
"versionEndIncluding": "4.2.0.0"
},
{
"criteria": "cpe:2.3:a:codesys:control:*:*:*:*:*:pfc100_sl:*:*",
"vulnerable": true,
"matchCriteriaId": "F00E63D5-8CA2-4082-B522-4B0C51772A4C",
"versionEndExcluding": "4.2.0.0"
},
{
"criteria": "cpe:2.3:a:codesys:control:*:*:*:*:*:pfc200_sl:*:*",
"vulnerable": true,
"matchCriteriaId": "6890F3F3-6DF2-4D0C-A431-B3705900E1EB",
"versionEndExcluding": "4.2.0.0"
},
{
"criteria": "cpe:2.3:a:codesys:control:*:*:*:*:*:plcnext_sl:*:*",
"vulnerable": true,
"matchCriteriaId": "7D6CA947-A0F3-4F45-804B-BAD4BD24CBC4",
"versionEndExcluding": "4.2.0.0"
},
{
"criteria": "cpe:2.3:a:codesys:control:*:*:*:*:*:raspberry_pi_sl:*:*",
"vulnerable": true,
"matchCriteriaId": "1545D5A9-739E-4C36-933A-B87A3D593A22",
"versionEndExcluding": "4.2.0.0"
},
{
"criteria": "cpe:2.3:a:codesys:control:*:*:*:*:*:wago_touch_panels_600_sl:*:*",
"vulnerable": true,
"matchCriteriaId": "7D0A2D1F-F297-4D5D-8FB1-1C80297E91A1",
"versionEndExcluding": "4.2.0.0"
},
{
"criteria": "cpe:2.3:a:codesys:control_rte:*:*:*:*:*:-:*:*",
"vulnerable": true,
"matchCriteriaId": "102C898A-8CA9-4C6E-AAAD-ED947F6DCEA2",
"versionEndExcluding": "3.5.17.10"
},
{
"criteria": "cpe:2.3:a:codesys:control_rte:*:*:*:*:*:beckhoff_cx:*:*",
"vulnerable": true,
"matchCriteriaId": "C629084B-E59E-4FA4-A866-7F2FE8C6D26B",
"versionEndExcluding": "3.5.17.10"
},
{
"criteria": "cpe:2.3:a:codesys:control_runtime_system_toolkit:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "48B1957E-472D-4A21-A8FC-DF2AF0C118F5",
"versionEndExcluding": "3.5.17.10"
},
{
"criteria": "cpe:2.3:a:codesys:control_win_sl:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FBCFD26C-0262-4D2B-99CA-E7EA0E6B75E3",
"versionEndExcluding": "3.5.17.10"
},
{
"criteria": "cpe:2.3:a:codesys:embedded_target_visu_toolkit:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B640C5A9-8241-4191-87F6-E31D6902702E",
"versionEndExcluding": "3.5.17.10"
},
{
"criteria": "cpe:2.3:a:codesys:hmi:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9116B38E-7B7C-48DB-B742-A8741EB63892",
"versionEndExcluding": "3.5.17.10"
},
{
"criteria": "cpe:2.3:a:codesys:remote_target_visu_toolkit:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C86F931B-F172-4B00-B484-48048756655F",
"versionEndExcluding": "3.5.17.10"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org"
}