{
  "cveId": "CVE-2026-48687",
  "url": "https://patchblox.com/security/cve/CVE-2026-48687",
  "summary": "CVE-2026-48687 is fixed in fastnetmon on 1 platform, first by fastnetmon 1.2.8\u002Bgit20250911-2ubuntu0.1~esm1, released May 26, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "fastnetmon: FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the Juniper router integ...",
  "description": "FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the Juniper router integration plugin. The _log() function in src/juniper_plugin/fastnetmon_juniper.php (lines 117-118) constructs shell commands by concatenating the $msg parameter directly into exec() calls: exec(\u0022echo \u0060date\u0060 \\\u0022- {FASTNETMON] - \u0022 . $msg . \u0022 \\\u0022 \u003E\u003E \u0022 . $FILE_LOG_TMP). The $msg variable contains unsanitized data derived from command-line arguments argv[1] through argv[3], which represent the attack IP address, direction, and power. While FastNetMon\u0027s C\u002B\u002B core currently passes IP addresses via inet_ntoa() (which only produces safe dotted-decimal notation), the PHP script performs no input validation or shell escaping. If the script is invoked directly, by another orchestration system, or if future code changes pass string-sourced IPs, arbitrary commands can be injected. The correct fix is to replace exec() with file_put_contents() or use escapeshellarg() on all parameters.",
  "published": "2026-05-26T09:16:00Z",
  "severity": "critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.01645,
  "epssPercentile": 0.76599,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "fastnetmon",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.2.9-0\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-48687",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48687",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "fastnetmon",
      "release": "Debian 14",
      "fixedVersion": "1.2.9-1",
      "fix": "DEBIAN-CVE-2026-48687",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48687",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "fastnetmon",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.1.4-1ubuntu0.1~esm1",
      "fix": "fastnetmon 1.1.4-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-fastnetmon-1.1.4-1ubuntu0.1-esm1",
      "released": "2026-06-24T14:07:32Z"
    },
    {
      "platform": "linux",
      "product": "fastnetmon",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.2.6-1ubuntu0.1~esm1",
      "fix": "fastnetmon 1.2.6-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-fastnetmon-1.2.6-1ubuntu0.1-esm1",
      "released": "2026-06-24T14:07:41Z"
    },
    {
      "platform": "linux",
      "product": "fastnetmon",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1.2.8\u002Bgit20250911-2ubuntu0.1~esm1",
      "fix": "fastnetmon 1.2.8\u002Bgit20250911-2ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-fastnetmon-1.2.8-git20250911-2ubuntu0.1-esm1",
      "released": "2026-05-26T12:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}