---
id: CVE-2016-20090
title: >-
  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
summary: >-
  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 executabl…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-428
published: '2026-06-19'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T09:10:00.157'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2016-20090'
references:
  - url: 'http://yildirimyunus.com'
    label: disclosure@vulncheck.com
  - url: 'https://www.comodo.com'
    label: disclosure@vulncheck.com
  - url: 'https://www.comodo.com/home/browsers-toolbars/browser.php'
    label: disclosure@vulncheck.com
  - url: 'https://www.exploit-db.com/exploits/40471'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/comodo-dragon-browser-privilege-escalation-via-unquoted-service-path
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00175
epssPercentile: 0.06286
ingestedAt: '2026-09-29T09:30:49.072Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.