{
  "cveId": "CVE-2020-0796",
  "url": "https://patchblox.com/security/cve/CVE-2020-0796",
  "summary": "CVE-2020-0796 is fixed in 8 products on 1 platform, first by KB4551762, released March 12, 2020. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on February 10, 2022, with known ransomware use. Patch Radar priority: Patch now.",
  "title": "Windows SMBv3 Client/Server Remote Code Execution Vulnerability",
  "description": "\u003Cp\u003EA remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests. An attacker who successfully exploited the vulnerability could gain the ability to execute code on the target server or client.\u003C/p\u003E\n\u003Cp\u003ETo exploit the vulnerability against a server, an unauthenticated attacker could send a specially crafted packet to a targeted SMBv3 server. To exploit the vulnerability against a client, an unauthenticated attacker would need to configure a malicious SMBv3 server and convince a user to connect to it.\u003C/p\u003E\n\u003Cp\u003EThe security update addresses the vulnerability by correcting how the SMBv3 protocol handles these specially crafted requests.\u003C/p\u003E",
  "published": "2020-03-12T07:00:00Z",
  "severity": "Critical",
  "cvss": 10,
  "epss": 0.9981,
  "epssPercentile": 0.99958,
  "priority": "Patch now",
  "priorityTier": 1,
  "exploited": true,
  "vendorExploited": false,
  "disclosed": true,
  "exploitabilityAssessment": "Exploitation More Likely",
  "kev": {
    "added": "2022-02-10T00:00:00Z",
    "due": "2022-08-10T00:00:00Z",
    "ransomware": true,
    "requiredAction": "Apply updates per vendor instructions."
  },
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-0796",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB4551762",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551762",
      "released": "2020-03-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB4551762",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551762",
      "released": "2020-03-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB4551762",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551762",
      "released": "2020-03-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB4551762",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551762",
      "released": "2020-03-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB4551762",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551762",
      "released": "2020-03-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB4551762",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551762",
      "released": "2020-03-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1903 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4551762",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551762",
      "released": "2020-03-12T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1909 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4551762",
      "url": "https://patchblox.com/security/fix/microsoft/kb4551762",
      "released": "2020-03-12T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}