{
  "cveId": "CVE-2021-21086",
  "url": "https://patchblox.com/security/cve/CVE-2021-21086",
  "summary": "CVE-2021-21086 is fixed in Adobe Acrobat Reader DC on 1 platform by Adobe Acrobat Reader DC 21.001.20155 (version 21.001.20155), released April 27, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Adobe Reader CoolType Arbitrary Stack Manipulation",
  "description": "Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by an Out-of-bounds Write vulnerability in the CoolType library. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.",
  "published": "2021-09-02T16:15:07Z",
  "severity": "",
  "cvss": 7.8,
  "cwe": "CWE-787: Out-of-bounds Write (CWE-787)",
  "epss": 0.04714,
  "epssPercentile": 0.9188,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2021-21086",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Adobe Acrobat Reader DC",
      "fixedVersion": "21.001.20155",
      "fix": "Adobe Acrobat Reader DC 21.001.20155",
      "url": "https://patchblox.com/security/fix/windows-app/adobe.acrobat.reader.32-bit-21.001.20155",
      "released": "2021-04-27T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}