{
  "cveId": "CVE-2021-4127",
  "url": "https://patchblox.com/security/cve/CVE-2021-4127",
  "summary": "CVE-2021-4127 is fixed in 4 products on 2 platforms, first by RHSA-2021:0990, released March 25, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Thunderbird: An out of date graphics library (Angle) likely contained vulnerabilities that could potentially be exploited.",
  "description": "An out of date graphics library (Angle) likely contained vulnerabilities that could potentially be exploited. This vulnerability affects Thunderbird \u003C 78.9 and Firefox ESR \u003C 78.9.",
  "published": "2021-03-25T00:00:00Z",
  "severity": "Important",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00945,
  "epssPercentile": 0.61292,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2021-4127",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Mozilla Thunderbird (en-US)",
      "fixedVersion": "78.10.0",
      "fix": "Mozilla Thunderbird (en-US) 78.10.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.thunderbird-78.10.0",
      "released": "2021-04-15T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "RHEL 8",
      "fixedVersion": "0:78.9.0-1.el8_3",
      "fix": "RHSA-2021:0990",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0990",
      "released": "2021-03-25T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-esr",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "78.9.0esr-1",
      "fix": "DEBIAN-CVE-2021-4127",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4127",
      "released": "2022-12-22T20:15:11Z"
    },
    {
      "platform": "linux",
      "product": "firefox-esr",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "78.9.0esr-1",
      "fix": "DEBIAN-CVE-2021-4127",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4127",
      "released": "2022-12-22T20:15:11Z"
    },
    {
      "platform": "linux",
      "product": "firefox-esr",
      "release": "Debian 14",
      "fixedVersion": "78.9.0esr-1",
      "fix": "DEBIAN-CVE-2021-4127",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4127",
      "released": "2022-12-22T20:15:11Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1:78.9.0-1",
      "fix": "DEBIAN-CVE-2021-4127",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4127",
      "released": "2022-12-22T20:15:11Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:78.9.0-1",
      "fix": "DEBIAN-CVE-2021-4127",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4127",
      "released": "2022-12-22T20:15:11Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 14",
      "fixedVersion": "1:78.9.0-1",
      "fix": "DEBIAN-CVE-2021-4127",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4127",
      "released": "2022-12-22T20:15:11Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "RHEL 8",
      "fixedVersion": "0:78.9.0-3.el8_3",
      "fix": "RHSA-2021:0993",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0993",
      "released": "2021-03-25T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}