{
  "fix": "TightVNC 2.8.63.0",
  "url": "https://patchblox.com/security/fix/windows-app/glavsoft.tightvnc-2.8.63.0",
  "summary": "TightVNC 2.8.63.0, released August 9, 2021, fixes 1 CVE in TightVNC. None of them is reported as exploited. Patch Radar priority: Urgent. The latest TightVNC is 2.8.89, which also fixes every one of these CVEs.",
  "platform": "windows-app",
  "type": "app-version",
  "title": "TightVNC 2.8.63.0",
  "released": "2021-08-09T00:00:00Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2021-42785, rated Critical",
  "supported": true,
  "cveCount": 1,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.02342,
  "maxCvss": 9.8,
  "appliesTo": [
    {
      "product": "TightVNC",
      "productUrl": "https://patchblox.com/security/product/windows-app/tightvnc",
      "fixedVersion": "2.8.63.0",
      "latestVersion": "2.8.89",
      "supported": true
    }
  ],
  "supersededBy": {
    "product": "TightVNC",
    "latestVersion": "2.8.89",
    "productUrl": "https://patchblox.com/security/product/windows-app/tightvnc"
  },
  "cves": [
    {
      "cveId": "CVE-2021-42785",
      "url": "https://patchblox.com/security/cve/CVE-2021-42785",
      "title": "Buffer Overflow in tvnviewer.exe via Crafted Packet in TightVNC Viewer 2.8.59",
      "priority": "Urgent",
      "cvss": 9.8,
      "epss": 0.02342,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-11T19:49:26Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}