{
  "cveId": "CVE-2021-33500",
  "url": "https://patchblox.com/security/cve/CVE-2021-33500",
  "summary": "CVE-2021-33500 is fixed in PuTTY on 1 platform by PuTTY 0.75.0.0 (version 0.75.0.0), released May 8, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "PuTTY: PuTTY before 0.75 on Windows allows remote servers to cause a denial of service (Windows GUI hang) by\u2026",
  "description": "PuTTY before 0.75 on Windows allows remote servers to cause a denial of service (Windows GUI hang) by telling the PuTTY window to change its title repeatedly at high speed, which results in many SetWindowTextA or SetWindowTextW calls. NOTE: the same attack methodology may affect some OS-level GUIs on Linux or other platforms for similar reasons.",
  "published": "2021-05-21T20:15:07Z",
  "severity": "",
  "cvss": 7.5,
  "epss": 0.01914,
  "epssPercentile": 0.79971,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2021-33500",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "PuTTY",
      "fixedVersion": "0.75.0.0",
      "fix": "PuTTY 0.75.0.0",
      "url": "https://patchblox.com/security/fix/windows-app/putty.putty-0.75.0.0",
      "released": "2021-05-08T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}