{
  "cveId": "CVE-2026-70571",
  "url": "https://patchblox.com/security/cve/CVE-2026-70571",
  "summary": "CVE-2026-70571 is fixed in 4 products on 1 platform, first by KB5128898, released October 13, 2026. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.",
  "title": "Microsoft Exchange Server Remote Code Execution Vulnerability",
  "description": "\u003Cp\u003EStack-based buffer overflow in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.\u003C/p\u003E",
  "published": "2026-10-13T07:00:00Z",
  "severity": "Critical",
  "cvss": 8.1,
  "cwe": "Stack-based Buffer Overflow",
  "epss": 0.01391,
  "epssPercentile": 0.72497,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation More Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70571",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Microsoft Exchange Server 2016 Cumulative Update 23",
      "fixedVersion": "",
      "fix": "KB5128898",
      "url": "https://patchblox.com/security/fix/microsoft/kb5128898",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Exchange Server 2019 Cumulative Update 14",
      "fixedVersion": "",
      "fix": "KB5128897",
      "url": "https://patchblox.com/security/fix/microsoft/kb5128897",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Exchange Server 2019 Cumulative Update 15",
      "fixedVersion": "",
      "fix": "KB5128896",
      "url": "https://patchblox.com/security/fix/microsoft/kb5128896",
      "released": "2026-10-13T07:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Exchange Server Subscription Edition RTM",
      "fixedVersion": "",
      "fix": "KB5128895",
      "url": "https://patchblox.com/security/fix/microsoft/kb5128895",
      "released": "2026-10-13T07:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}