CVE-2021-32976
Estado: ModificadaCrítica (9.8)—
Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.
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: 2.79%
- Percentil entre todas las CVEs puntuadas: 86
- 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 (4)
CWE
- CWE-121
- CWE-787
Referencias
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-187-01
- https://www.moxa.com/en/support/product-support/security-advisory/nport-iaw5000a-io-serial-device-server-vulnerabilities
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-187-01
- https://www.moxa.com/en/support/product-support/security-advisory/nport-iaw5000a-io-serial-device-server-vulnerabilities
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-32976",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-32976",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2025-04-16T15:56:27.792123Z"
}
}
],
"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": "ics-cert@hq.dhs.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": "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": "ics-cert@hq.dhs.gov",
"affectedData": [
{
"vendor": "Moxa",
"product": "NPort IAW5000A-I/O series firmware",
"versions": [
{
"status": "affected",
"version": "unspecified",
"versionType": "custom",
"lessThanOrEqual": "2.2"
}
]
}
]
}
],
"published": "2022-04-01T23:15:10.083",
"references": [
{
"url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-187-01",
"tags": [
"Mitigation",
"Third Party Advisory",
"US Government Resource"
],
"source": "ics-cert@hq.dhs.gov"
},
{
"url": "https://www.moxa.com/en/support/product-support/security-advisory/nport-iaw5000a-io-serial-device-server-vulnerabilities",
"tags": [
"Vendor Advisory"
],
"source": "ics-cert@hq.dhs.gov"
},
{
"url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-187-01",
"tags": [
"Mitigation",
"Third Party Advisory",
"US Government Resource"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.moxa.com/en/support/product-support/security-advisory/nport-iaw5000a-io-serial-device-server-vulnerabilities",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "ics-cert@hq.dhs.gov",
"description": [
{
"lang": "en",
"value": "CWE-121"
}
]
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code."
},
{
"lang": "es",
"value": "Cinco desbordamientos de búfer en el servidor web incorporado en la serie Moxa NPort IAW5000A-I/O firmware versión 2.2 o anterior pueden permitir a un atacante remoto iniciar un ataque de denegación de servicio y ejecutar código arbitrario"
}
],
"lastModified": "2026-06-17T03:53:55.913",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:moxa:nport_iaw5150a-6i\\/o_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "47EB7A90-A02B-4C42-92A5-7211E1006A51",
"versionEndIncluding": "2.2"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:moxa:nport_iaw5150a-6i\\/o:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "529AE3C8-5DE0-40EF-95E4-A5B350BCF622"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:moxa:nport_iaw5150a-12i\\/o_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "45C11EE4-AA32-44B1-85AF-99D1BE4BB28C",
"versionEndIncluding": "2.2"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:moxa:nport_iaw5150a-12i\\/o:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "7941EC99-D0BA-4EC6-B1AE-0F836356805C"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:moxa:nport_iaw5250a-6i\\/o_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "30FA4CDC-76ED-4AAA-A575-7AA472CC2BE6",
"versionEndIncluding": "2.2"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:moxa:nport_iaw5250a-6i\\/o:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "B09B3B88-7382-41D6-A3ED-514E170D52FA"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:moxa:nport_iaw5250a-12i\\/o_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E0BE59D3-D91D-4E53-B4F3-C29488261E88",
"versionEndIncluding": "2.2"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:moxa:nport_iaw5250a-12i\\/o:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "38F518C4-245F-4225-9FC5-DFDFECD38ECE"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "ics-cert@hq.dhs.gov"
}