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Harmony BrowseApplication · Checkpoint

CVE-2021-30359

HIGH · 7.8 CVSS v3.1 Published 2021-10-22
Fix available
A fix is available. Upgrade to 90.08.7405 or later.
See remediation →
80/100
Remediation priority · High
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
The Harmony Browse and the SandBlast Agent for Browsers installers must have admin privileges to execute some steps during the installation. Because the MS Installer allows regular users to repair their installation, an attacker running an installer before 90.08.7405 can start the installation repair and place a specially crafted binary in the repair folder, which runs with the admin privileges.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

This is a local privilege escalation vulnerability in Check Point Harmony Browse and SandBlast Agent for Browsers. The MSI installer repair functionality allows regular users to trigger a repair operation, during which an attacker can place a malicious binary in the repair folder that executes with elevated administrator privileges. This enables a standard user to gain SYSTEM-level code execution.

MitigationUpgrade to Harmony Browse/SandBlast Agent for Browsers version 90.08.7405 or later, which addresses the insecure repair folder manipulation.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Harmony BrowseApplication
Affected:< 90.08.7405
Sandblast Agent For BrowsersApplication
Affected:< 90.08.7405

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Verify if Check Point Harmony Browse or SandBlast Agent for Browsers is installed
    Open Control Panel > Programs and Features, or run 'Get-WmiObject -Class Win32_Product' in PowerShell, and look for entries named 'Checkpoint Harmony Browse' or 'Checkpoint SandBlast Agent for Browsers'
    Affected if Either product appears in the installed programs list
  2. Retrieve the installed product version
    Right-click the installed program in Programs and Features and select Properties, or query the registry at HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{ProductGUID} for the DisplayVersion value
    Affected if The displayed version is a version number less than 90.08.7405 (e.g., 90.08.xxxx where xxxx is less than 7405, or any earlier major version)
  3. Confirm the vulnerable component is present
    Check for the existence of the Check Point browser protection service or check Program Files for a Check Point installation folder (typically named 'Check Point' or similar)
    Affected if The product is installed and the Check Point browser protection components are present on the system

A user is affected if Check Point Harmony Browse or SandBlast Agent for Browsers is installed with a version number lower than 90.08.7405, as this version introduced the fix for the insecure MSI repair folder manipulation vulnerability.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 90.08.7405 or later
Fixed in 90.08.7405
Interim mitigation

Upgrade to Harmony Browse/SandBlast Agent for Browsers version 90.08.7405 or later, which addresses the insecure repair folder manipulation.

Recommended fix High confidence

90.08.7405 or later

  1. Identify the currently installed version of Harmony Browse or Sandblast Agent for Browsers by opening the application and checking About/Help, or by locating it in Windows Programs and Features
  2. Navigate to the official Check Point support portal (supportcontent.checkpoint.com) or the Check Point software download center
  3. Download the fixed version 90.08.7405 or later of the affected product
  4. Uninstall the current vulnerable version through Windows Control Panel > Programs and Features
  5. Restart the computer to ensure clean removal of the vulnerable software
  6. Run the downloaded installer for version 90.08.7405 or later with administrator privileges
  7. Follow the installation wizard prompts to complete the installation
  8. Verify the installed version is 90.08.7405 or higher after installation completes

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Harmony Browse Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
5.0 hours of engineering $860
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-30359 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data