{
  "product": "Microsoft Exchange Server 2016 Cumulative Update 21",
  "url": "https://patchblox.com/security/product/microsoft/microsoft-exchange-server-2016-cumulative-update-21",
  "summary": "Patch Radar has 6 security fixes for Microsoft Exchange Server 2016 Cumulative Update 21, closing 16 CVEs, 2 of which are being exploited. The newest security fix is KB5012698, released March 8, 2022. This product is no longer supported.",
  "platform": "microsoft",
  "vendor": "Microsoft",
  "supported": false,
  "fixCount": 6,
  "cveCount": 16,
  "exploitedCveCount": 2,
  "unfixedCveCount": 0,
  "fixes": [
    {
      "fix": "KB5012698",
      "url": "https://patchblox.com/security/fix/microsoft/kb5012698",
      "released": "2022-03-08T14:00:00Z",
      "fixedVersion": "",
      "priority": "Urgent",
      "cveCount": 2,
      "exploitedCveCount": 0
    },
    {
      "fix": "KB5008631",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008631",
      "released": "2022-01-11T14:00:00Z",
      "fixedVersion": "",
      "priority": "Urgent",
      "cveCount": 3,
      "exploitedCveCount": 0
    },
    {
      "fix": "KB5007409",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007409",
      "released": "2021-11-09T14:00:00Z",
      "fixedVersion": "",
      "priority": "Patch now",
      "cveCount": 3,
      "exploitedCveCount": 1
    },
    {
      "fix": "KB5007012",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007012",
      "released": "2021-10-12T12:00:00Z",
      "fixedVersion": "",
      "priority": "High",
      "cveCount": 4,
      "exploitedCveCount": 0
    },
    {
      "fix": "KB5004779",
      "url": "https://patchblox.com/security/fix/microsoft/kb5004779",
      "released": "2021-07-13T12:00:00Z",
      "fixedVersion": "",
      "priority": "Patch now",
      "cveCount": 3,
      "exploitedCveCount": 1
    },
    {
      "fix": "KB5003611",
      "url": "https://patchblox.com/security/fix/microsoft/kb5003611",
      "released": "2021-07-13T12:00:00Z",
      "fixedVersion": "",
      "priority": "High",
      "cveCount": 1,
      "exploitedCveCount": 0
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-12T19:57:06Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}