CVE-2026-47876 (GCVE-0-2026-47876)
Vulnerability from cvelistv5
Published
2026-07-30 12:31
Modified
2026-07-30 13:02
Severity ?
CWE
Summary
VMware ESX contains an out-of-bounds write vulnerability in the VMXNET3 virtual network adapter. A malicious actor with local administrative privileges on a virtual machine with VMXNET3 virtual network adapter may exploit this issue to execute code on the host. Non VMXNET3 virtual adapters are not affected by this issue.
Impacted products
Vendor Product Version
VMware Cloud Foundation Version: 9.1.x.x
Version: 9.0.x.x
Version: 5.x
Create a notification for this product.
   VMware vSphere Foundation Version: 9.1.x.x
Version: 9.0.x.x
Create a notification for this product.
   VMware ESX Version: 9.1.x.x   < ESXi-9.1.0.0200-25557999
Version: 9.0.x.x   < ESXi-9.0.2.0100-25595025
Version: 8.0   < ESXi80U3k-25595708
Create a notification for this product.
   VMware Telco Cloud Platform Version: 5.1.x
Version: 5.0.x
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-47876",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-30T13:02:22.733448Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-30T13:02:29.161Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Cloud Foundation",
          "vendor": "VMware",
          "versions": [
            {
              "status": "affected",
              "version": "9.1.x.x"
            },
            {
              "status": "affected",
              "version": "9.0.x.x"
            },
            {
              "status": "affected",
              "version": "5.x"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "vSphere Foundation",
          "vendor": "VMware",
          "versions": [
            {
              "status": "affected",
              "version": "9.1.x.x"
            },
            {
              "status": "affected",
              "version": "9.0.x.x"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "ESX",
          "vendor": "VMware",
          "versions": [
            {
              "lessThan": "ESXi-9.1.0.0200-25557999",
              "status": "affected",
              "version": "9.1.x.x",
              "versionType": "custom"
            },
            {
              "lessThan": "ESXi-9.0.2.0100-25595025",
              "status": "affected",
              "version": "9.0.x.x",
              "versionType": "custom"
            },
            {
              "lessThan": "ESXi80U3k-25595708",
              "status": "affected",
              "version": "8.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Telco Cloud Platform",
          "vendor": "VMware",
          "versions": [
            {
              "status": "affected",
              "version": "5.1.x"
            },
            {
              "status": "affected",
              "version": "5.0.x"
            }
          ]
        }
      ],
      "datePublic": "2026-07-29T04:30:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "VMware ESX contains an out-of-bounds write vulnerability in the VMXNET3 virtual network adapter.\u0026nbsp;\u003cspan\u003eA malicious actor with local administrative privileges on a virtual machine with VMXNET3 virtual network adapter may exploit this issue to execute code on the host. Non VMXNET3 virtual adapters are not affected by this issue.\u003c/span\u003e\u003cbr\u003e\u003cbr\u003e"
            }
          ],
          "value": "VMware ESX contains an out-of-bounds write vulnerability in the VMXNET3 virtual network adapter.\u00a0A malicious actor with local administrative privileges on a virtual machine with VMXNET3 virtual network adapter may exploit this issue to execute code on the host. Non VMXNET3 virtual adapters are not affected by this issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787 Out-of-bounds write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-30T12:31:52.158Z",
        "orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
        "shortName": "vmware"
      },
      "references": [
        {
          "url": "https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/38017"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "VMXNET3 out-of-bounds write vulnerability",
      "x_generator": {
        "engine": "Vulnogram 1.0.4"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
    "assignerShortName": "vmware",
    "cveId": "CVE-2026-47876",
    "datePublished": "2026-07-30T12:31:52.158Z",
    "dateReserved": "2026-05-20T10:00:58.694Z",
    "dateUpdated": "2026-07-30T13:02:29.161Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-47876\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-30T13:02:22.733448Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-30T13:02:26.649Z\"}}], \"cna\": {\"title\": \"VMXNET3 out-of-bounds write vulnerability\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 9.3, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"VMware\", \"product\": \"Cloud Foundation\", \"versions\": [{\"status\": \"affected\", \"version\": \"9.1.x.x\"}, {\"status\": \"affected\", \"version\": \"9.0.x.x\"}, {\"status\": \"affected\", \"version\": \"5.x\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"VMware\", \"product\": \"vSphere Foundation\", \"versions\": [{\"status\": \"affected\", \"version\": \"9.1.x.x\"}, {\"status\": \"affected\", \"version\": \"9.0.x.x\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"VMware\", \"product\": \"ESX\", \"versions\": [{\"status\": \"affected\", \"version\": \"9.1.x.x\", \"lessThan\": \"ESXi-9.1.0.0200-25557999\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"9.0.x.x\", \"lessThan\": \"ESXi-9.0.2.0100-25595025\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"8.0\", \"lessThan\": \"ESXi80U3k-25595708\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"VMware\", \"product\": \"Telco Cloud Platform\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.1.x\"}, {\"status\": \"affected\", \"version\": \"5.0.x\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-07-29T04:30:00.000Z\", \"references\": [{\"url\": \"https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/38017\"}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.4\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"VMware ESX contains an out-of-bounds write vulnerability in the VMXNET3 virtual network adapter.\\u00a0A malicious actor with local administrative privileges on a virtual machine with VMXNET3 virtual network adapter may exploit this issue to execute code on the host. Non VMXNET3 virtual adapters are not affected by this issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"VMware ESX contains an out-of-bounds write vulnerability in the VMXNET3 virtual network adapter.\u0026nbsp;\u003cspan\u003eA malicious actor with local administrative privileges on a virtual machine with VMXNET3 virtual network adapter may exploit this issue to execute code on the host. Non VMXNET3 virtual adapters are not affected by this issue.\u003c/span\u003e\u003cbr\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787 Out-of-bounds write\"}]}], \"providerMetadata\": {\"orgId\": \"dcf2e128-44bd-42ed-91e8-88f912c1401d\", \"shortName\": \"vmware\", \"dateUpdated\": \"2026-07-30T12:31:52.158Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-47876\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-30T13:02:29.161Z\", \"dateReserved\": \"2026-05-20T10:00:58.694Z\", \"assignerOrgId\": \"dcf2e128-44bd-42ed-91e8-88f912c1401d\", \"datePublished\": \"2026-07-30T12:31:52.158Z\", \"assignerShortName\": \"vmware\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…