CVE-2021-21992
Estado: ModificadaMedia (6.5)—
The vCenter Server contains a denial-of-service vulnerability due to improper XML entity parsing. A malicious actor with non-administrative user access to the vCenter Server vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash) may exploit this issue to create a denial-of-service condition on the vCenter Server host.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/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: 0.98%
- Percentil entre todas las CVEs puntuadas: 61
- Fecha de la puntuación: 7/10/2026
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 (2)
CWE
- NVD-CWE-noinfo
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-21992",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 6.8,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:C",
"authentication": "SINGLE",
"integrityImpact": "NONE",
"accessComplexity": "LOW",
"availabilityImpact": "COMPLETE",
"confidentialityImpact": "NONE"
},
"acInsufInfo": false,
"impactScore": 6.9,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 8,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 6.5,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 2.8
}
]
},
"affected": [
{
"source": "security@vmware.com",
"affectedData": [
{
"vendor": "n/a",
"product": "VMware vCenter Server, VMware Cloud Foundation",
"versions": [
{
"status": "affected",
"version": "VMware vCenter Server(7.x before 7.0 U2c, 6.7 before 6.7 U3o and 6.5 before 6.5 U3q) and VMware Cloud Foundation (4.x before 4.3 and 3.x before 3.10.2.2)"
}
]
}
]
}
],
"published": "2021-09-22T19:15:09.733",
"references": [
{
"url": "https://www.vmware.com/security/advisories/VMSA-2021-0020.html",
"tags": [
"Vendor Advisory"
],
"source": "security@vmware.com"
},
{
"url": "https://www.vmware.com/security/advisories/VMSA-2021-0020.html",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "The vCenter Server contains a denial-of-service vulnerability due to improper XML entity parsing. A malicious actor with non-administrative user access to the vCenter Server vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash) may exploit this issue to create a denial-of-service condition on the vCenter Server host."
},
{
"lang": "es",
"value": "vCenter Server contiene una vulnerabilidad de denegación de servicio debido al análisis incorrecto de entidades XML. Un actor malicioso con acceso de usuario no administrativo al vCenter Server vSphere Client (HTML5) o al vCenter Server vSphere Web Client (FLEX/Flash) puede explotar este problema para crear una condición de denegación de servicio en el host de vCenter Server"
}
],
"lastModified": "2026-06-17T03:36:31.040",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "127DEE95-0B04-4A98-B96A-15CC253C7357",
"versionEndExcluding": "3.10.2.2",
"versionStartIncluding": "3.0"
},
{
"criteria": "cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "722CF000-C0A1-4704-BDC6-3446D1530F3B",
"versionEndExcluding": "4.3",
"versionStartIncluding": "4.0"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "23CFE5A5-A166-4FD5-BE97-5F16DAB1EAE0"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:a:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CF7DDB0C-3C07-4B5E-8B8A-0542FEE72877"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:b:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1DD16169-A7DF-4604-888C-156A60018E32"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:c:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "46FC9F34-C8FA-4AFE-9F4A-7CF9516BD4D9"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:d:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D26534EB-327B-4ED6-A3E1-005552CB1F9D"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:e:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "786CDD50-7E18-4437-8DB9-2D0ADECD436E"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:f:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B2CE8DAE-0E78-4004-983D-1ECD8855EC33"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7E51F433-1152-4E94-AF77-970230B1A574"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update1b:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0064D104-E0D8-481A-9029-D3726A1A9CF4"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update1c:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9B4D3F61-6CD9-411F-A205-EB06A57EBB4E"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update1d:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F72A1E9C-F960-4E8C-A46C-B38209E6349E"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update1e:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2C33CE46-F529-4EA9-9344-6ED3BFA7019D"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update1g:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9F1D8161-0E02-45C9-BF61-14799AB65E03"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1F2CB1FF-6118-4875-945D-07BAA3A21FFA"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update2b:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1AEDA28A-5C8E-4E95-A377-3BE530DBEAB5"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update2c:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "BDDC6510-3116-4578-80C8-8EF044A8370A"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update2d:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8678DB48-CB98-4E4C-ADE6-CABA73265FEC"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update2g:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DBD9A341-1FBF-4E04-848B-550DEB27261A"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4955663C-1BB6-4F3E-9D4B-362DF144B7F1"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update3d:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CE0F8453-3D6C-4F1C-9167-3F02E3D905DC"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update3f:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0EAD4045-A7F9-464F-ABB9-3782941162CC"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update3k:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2F0A79C2-33AE-40C5-A853-770A4C691F29"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update3n:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D8BB6CBC-11D6-40A4-ABAF-53AB9BED5A73"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.5:update3p:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "26A3EC15-8C04-49AD-9045-4D9FADBD50CD"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E456F84C-A86E-4EA9-9A3E-BEEA662136E6"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:a:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5241C282-A02B-44B2-B6CA-BA3A99F9737C"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:b:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "04A60AC7-C2EA-4DBF-9743-54D708584AFA"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:d:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8A91B0C4-F184-459E-AFD3-DE0E351CC964"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "23253631-2655-48A8-9B00-CB984232329C"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update1b:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "50C2A9A8-0E66-4702-BCD4-74622108E7A6"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EE4D3E2A-C32D-408F-B811-EF8BC86F0D34"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update2a:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "31CA7802-D78D-4BAD-A45A-68B601C010C6"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update2c:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3B98981B-4721-4752-BAB4-361DB5AEB86F"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "04487105-980A-4943-9360-4442BF0411E6"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update3a:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "24D24E06-EB3F-4F11-849B-E66757B01466"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update3b:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8AF12716-88E2-44B5-ACD7-BCBECA130FB8"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update3f:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3352212C-E820-47B3-BDF5-57018F5B9E81"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update3g:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6436ADFD-6B94-4D2A-B09B-CED4EC6CA276"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update3j:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D06832CE-F946-469D-B495-6735F18D02A0"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update3l:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "726AC46D-9EA8-4FE8-94B8-0562935458F2"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update3m:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0243D22F-1591-4A95-A7FE-2658CEE0C08F"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:6.7:update3n:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "02AE5983-CD14-4EAF-9F5C-1281E3DE7F46"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5FA81CCD-A05E-498C-820E-21980E92132F"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:a:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0EE83406-A3D9-4F75-A1A6-63831CEBEEC1"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:b:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FB563627-C9CF-4D8A-B882-9AB65EAE9E15"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:c:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DCA03B2A-48B2-48AD-B8EB-9D7BB2016819"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:d:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A2392D0F-D7A2-4E01-9212-1BA6C895AEBF"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:update1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6D731C1A-9FE5-461C-97E2-6F45E4CBABE1"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:update1a:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8725E544-2A94-4829-A683-1ECCE57A74A6"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:update1c:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0FC6765A-6584-45A8-9B21-4951D2EA8939"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:update1d:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "85DD238C-EF73-44F0-928E-A94FF5C4B378"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:update2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F4CA36C1-732E-41AE-B847-F7411B753F3D"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:update2a:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0DA882B6-D811-4E4B-B614-2D48F0B9036E"
},
{
"criteria": "cpe:2.3:a:vmware:vcenter_server:7.0:update2b:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8D30A78E-16D0-4A2E-A2F8-F6073698243E"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "security@vmware.com"
}