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CVE-2016-20090

Status: DeferredHigh (8.5)—

Comodo Dragon Browser versions up to 52.15.25.663 contain a privilege escalation vulnerability in the DragonUpdater service due to an unquoted service path running with SYSTEM privileges. A local attacker can insert a malicious executable in the service path and execute arbitrary code with elevated privileges upon service restart or system reboot.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vulnerabilidad local (AV:L, PR:L) en servicio SYSTEM con ruta sin entrecomillar; permite insertar ejecutable malicioso para ejecución arbitraria de código elevado.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Comodo — Dragon BrowserAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2016-20090",
  "cveTags": [],
  "metrics": {
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          "options": [
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          "version": "2.0.3",
          "timestamp": "2026-06-22T19:33:30.951157Z"
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          "integrityImpact": "HIGH",
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          "valueDensity": "NOT_DEFINED",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "affectedData": [
        {
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  "published": "2026-06-19T15:16:32.797",
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      "url": "http://yildirimyunus.com",
      "source": "disclosure@vulncheck.com"
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      "url": "https://www.comodo.com",
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    {
      "url": "https://www.comodo.com/home/browsers-toolbars/browser.php",
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    },
    {
      "url": "https://www.exploit-db.com/exploits/40471",
      "source": "disclosure@vulncheck.com"
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      "url": "https://www.vulncheck.com/advisories/comodo-dragon-browser-privilege-escalation-via-unquoted-service-path",
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      "value": "Comodo Dragon Browser versions up to 52.15.25.663 contain a privilege escalation vulnerability in the DragonUpdater service due to an unquoted service path running with SYSTEM privileges. A local attacker can insert a malicious executable in the service path and execute arbitrary code with elevated privileges upon service restart or system reboot."
    },
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    }
  ],
  "lastModified": "2026-09-29T09:10:00.157",
  "sourceIdentifier": "disclosure@vulncheck.com"
}