{
  "id": "CVE-2023-34048",
  "url": "https://spydr.io/cve/CVE-2023-34048",
  "published": "2023-10-25T18:17:27.897Z",
  "modified": "2026-06-17T06:02:47.860Z",
  "score": 9.8,
  "severity": "critical",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "NVD",
  "epss": 0.99428,
  "epss_percentile": 0.99942,
  "exploited": true,
  "kev": {
    "added": "2024-01-22",
    "due": "2024-02-12",
    "action": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
    "ransomware": "Unknown",
    "name": "VMware vCenter Server Out-of-Bounds Write Vulnerability",
    "notes": "https://www.vmware.com/security/advisories/VMSA-2023-0023.html; https://nvd.nist.gov/vuln/detail/CVE-2023-34048"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "VMware"
  ],
  "products": [
    "VMware vCenter Server",
    "VMware Cloud Foundation (VMware vCenter Server)",
    "vmware cloud_foundation"
  ],
  "cwes": [
    "CWE-787"
  ],
  "description": "vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol. A malicious actor with network access to vCenter Server may trigger an out-of-bounds write potentially leading to remote code execution.",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 9.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://www.vmware.com/security/advisories/VMSA-2023-0023.html",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2023-34048",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}