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CVE-2021-20047

Status: ModifiedHigh (7.8)—

SonicWall Global VPN client version 4.10.6 (32-bit and 64-bit) and earlier have a DLL Search Order Hijacking vulnerability. Successful exploitation via a local attacker could result in remote code execution in the target system.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Sonicwall — Global VPN Client

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-20047",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.9,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.4,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "PSIRT@sonicwall.com",
      "affectedData": [
        {
          "vendor": "SonicWall",
          "product": "SonicWall Global VPN Client",
          "versions": [
            {
              "status": "affected",
              "version": "Global VPN Client 4.10.6 and earlier"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-08T10:15:08.247",
  "references": [
    {
      "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0025",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "PSIRT@sonicwall.com"
    },
    {
      "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0025",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "PSIRT@sonicwall.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-427"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-427"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "SonicWall Global VPN client version 4.10.6 (32-bit and 64-bit) and earlier have a DLL Search Order Hijacking vulnerability. Successful exploitation via a local attacker could result in remote code execution in the target system."
    },
    {
      "lang": "es",
      "value": "El cliente SonicWall Global VPN versión 4.10.6 (32 bits y 64 bits) y anteriores, presentan una vulnerabilidad de Secuestro de Órdenes de Búsqueda de DLL. Una explotación con éxito por medio de un atacante local podría resultar en una ejecución de código remota en el sistema objetivo"
    }
  ],
  "lastModified": "2026-06-17T03:33:12.463",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:sonicwall:global_vpn_client:*:*:*:*:*:*:x64:*",
              "vulnerable": true,
              "matchCriteriaId": "6753B3C2-C77F-4CB0-BC09-DA2F6BD4AB0E",
              "versionEndIncluding": "4.10.6"
            },
            {
              "criteria": "cpe:2.3:a:sonicwall:global_vpn_client:*:*:*:*:*:*:x86:*",
              "vulnerable": true,
              "matchCriteriaId": "02A8917C-3DE5-48F5-B716-517B89195C1D",
              "versionEndIncluding": "4.10.6"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "PSIRT@sonicwall.com"
}