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CVE-2021-21511

Estado: ModificadaAlta (8.1)—

Dell EMC Avamar Server, versions 19.3 and 19.4 contain an Improper Authorization vulnerability in the web UI. A remote low privileged attacker could potentially exploit this vulnerability, to gain unauthorized read or modification access to other users' backup data.

CVSS

Probabilidad de explotación (EPSS)

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)

Dell — EMC Avamar ServerDell — EMC Integrated Data Protection Appliance

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-21511",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
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          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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  "affected": [
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      "affectedData": [
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          "product": "Avamar",
          "versions": [
            {
              "status": "affected",
              "version": "19.3, 19.4"
            }
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  "published": "2021-02-15T22:15:13.897",
  "references": [
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      "url": "https://www.dell.com/support/kbdoc/en-us/000182926/dsa-2021-033-dell-emc-avamar-server-improper-authorization-vulnerability",
      "tags": [
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      "tags": [
        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-285"
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    {
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "NVD-CWE-Other"
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    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Dell EMC Avamar Server, versions 19.3 and 19.4 contain an Improper Authorization vulnerability in the web UI. A remote low privileged attacker could potentially exploit this vulnerability, to gain unauthorized read or modification access to other users' backup data."
    },
    {
      "lang": "es",
      "value": "Dell EMC Avamar Server, versiones 19.3 y 19.4, contienen una vulnerabilidad de Autorización Inapropiada en la Interfaz de Usuario web. Un atacante remoto con pocos privilegios podría aprovechar esta vulnerabilidad para obtener acceso no autorizado de lectura o modificación a los datos de respaldo de otros usuarios"
    }
  ],
  "lastModified": "2026-06-17T03:35:42.077",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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            },
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              "vulnerable": true,
              "matchCriteriaId": "F5D783F9-E4AD-41A8-B1F9-D52333B00D62"
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          "operator": "OR"
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  "sourceIdentifier": "security_alert@emc.com"
}