{
  "cveId": "CVE-2026-77605",
  "url": "https://patchblox.com/security/cve/CVE-2026-77605",
  "summary": "CVE-2026-77605 is fixed in Notepad\u002B\u002B on 1 platform by Notepad\u002B\u002B 8.9.1 (version 8.9.1), released January 26, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Notepad\u002B\u002B \u201CRun by system\u201D executes *.txt.cmd when user selected *.txt (target confusion \u2192 command execution)",
  "description": "Notepad\u002B\u002B is a free and open-source source code editor. Prior to 8.9.8, the Folder as Workspace Run by system action in Notepad\u002B\u002B can resolve a different sibling file than the file selected by the user. When an attacker places a command script whose name is the selected text-file path with .cmd appended, and the user invokes Run by system on the text file on Windows 10 or Windows 11, Notepad\u002B\u002B can execute the sibling script as the current user instead of opening the selected file. This issue is fixed in version 8.9.8.",
  "published": "2026-09-22T18:17:19Z",
  "severity": "",
  "cvss": 7.8,
  "cwe": "CWE-20: Improper Input Validation",
  "epss": 0.00213,
  "epssPercentile": 0.11644,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2026-77605",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Notepad\u002B\u002B",
      "fixedVersion": "8.9.1",
      "fix": "Notepad\u002B\u002B 8.9.1",
      "url": "https://patchblox.com/security/fix/windows-app/notepad-.notepad-8.9.1",
      "released": "2026-01-26T00:00:00Z"
    }
  ],
  "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"
  }
}