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Netvault BackupApplication · Quest

CVE-2026-7569

HIGH · 8.8 CVSS v3.0 Published 2026-06-25
Fix available
A fix is available. Upgrade to 14.0.2 or later.
See remediation →
95/100
Remediation priority · Urgent
Remotely reachable No privileges 8 weeks old

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
Quest NetVault Backup viewclient Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of Quest NetVault Backup. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the viewclient webpage. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-28202.

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 · moderate confidence

Quest NetVault Backup's viewclient webpage suffers from a cross-site scripting (XSS) vulnerability due to insufficient validation of user-supplied input. This allows injection of arbitrary JavaScript into the page. The vulnerability requires user interaction (visiting a malicious page/file) but can be chained with other flaws to achieve SYSTEM-level code execution.

MitigationImplement strict input validation and output encoding on all user-supplied data within the viewclient component to prevent script injection. Consider implementing Content Security Policy (CSP) headers as a defense-in-depth measure.

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
Netvault BackupApplication
Affected:< 14.0.2

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
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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 Quest NetVault Backup is installed
    Check for the installation directory (typically C:\Program Files\Quest\NetVault Backup or /opt/netvault) or look for the NetVault service running on the system
    Affected if The product is not installed or no NetVault service is found, the system is not affected by this CVE
  2. Determine installed version
    Locate the version information - check the NetVault installation directory for a version file, or run 'nvtsa -v' or 'nvadmin -v' from the bin directory, or inspect the Windows registry under HKLM\SOFTWARE\Quest\NetVault\Backup\CurrentVersion
    Affected if The installed version is any version prior to 14.0.2 (e.g., 14.0.1, 14.0.0, 13.x, etc.)
  3. Confirm viewclient web interface is accessible
    Check if the viewclient component is enabled by examining the NetVault configuration files (typically nvwebui.conf or similar in the config directory), or attempt to access the web interface on port 8443 or 2003 default ports
    Affected if The viewclient web interface is enabled and reachable on the network
  4. Verify input validation configuration
    Examine the NetVault web server configuration files for any custom input validation or output encoding settings applied to the viewclient component. Look for any custom filter or sanitization rules in the web.xml or equivalent configuration
    Affected if No custom input validation or output encoding is configured for viewclient, leaving it vulnerable to XSS injection

A system is affected if Quest NetVault Backup version is below 14.0.2 AND the viewclient web interface is enabled and lacks custom input validation.

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 14.0.2 or later
Fixed in 14.0.2
Interim mitigation

Implement strict input validation and output encoding on all user-supplied data within the viewclient component to prevent script injection. Consider implementing Content Security Policy (CSP) headers as a defense-in-depth measure.

Recommended fix High confidence

NetVault Backup 14.0.2

  1. 1. Download NetVault Backup version 14.0.2 from the Quest support portal (support.quest.com)
  2. 2. Review the release notes and upgrade documentation specific to your current version
  3. 3. Schedule a maintenance window and backup all critical data
  4. 4. Stop the NetVault Backup services before upgrading
  5. 5. Run the installer for version 14.0.2
  6. 6. Follow the prompts to complete the upgrade
  7. 7. Restart NetVault Backup services
  8. 8. Verify the viewclient webpage functions correctly and the XSS vulnerability is remediated
Caveat Review Quest upgrade documentation for any configuration or compatibility changes between your current version and 14.0.2

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

Fix this in Netvault Backup Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
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An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.

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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-2026-7569 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