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Netvault BackupApplication · Quest

CVE-2026-9783

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 →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click 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 NVBURemovableMedia SQL Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Quest NetVault Backup. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the processing of NVBURemovableMedia JSON-RPC messages. The issue results from the lack of proper validation of a user-supplied string before using it to construct SQL queries. An attacker can leverage this vulnerability to execute code in the context of NETWORK SERVICE. Was ZDI-CAN-27632.

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

SQL injection vulnerability in Quest NetVault Backup's NVBURemovableMedia JSON-RPC handler allows remote attackers to inject malicious SQL queries via unsanitized user input. Although authentication is required, the authentication mechanism can be bypassed, enabling unauthenticated attackers to achieve remote code execution as NETWORK SERVICE.

MitigationApply vendor-provided patch immediately; until patch is available, restrict network access to NetVault Backup services and implement WAF rules to block SQL injection patterns in JSON-RPC traffic.

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/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. Identify if Quest NetVault Backup is installed
    Check for NetVault Backup installation by looking for its program directory (typically C:\Program Files\Quest\NetVault Backup or /opt/netvault on Linux) and examine the installed software list using system inventory tools or package managers
    Affected if NetVault Backup is found on the system
  2. Determine the installed NetVault Backup version
    Locate the version information in the installation directory, typically in a version.txt file, or run the NetVault Backup version command (nvadmin -version or check the About section in the management console)
    Affected if The installed version is lower than 14.0.2
  3. Verify the NVBURemovableMedia service exists and is running
    Check for the NVBURemovableMedia or related NetVault service process using task manager (Windows) or ps command (Linux), and verify the service is actively listening on its configured port
    Affected if The NVBURemovableMedia service is present and running
  4. Confirm JSON-RPC interface is network-accessible
    Check network configuration and firewall rules to determine if the NetVault Backup JSON-RPC port (commonly port 8443 or configured service port) is exposed to networkaccessible IP addresses rather than localhost only
    Affected if The JSON-RPC handler is reachable from network addresses beyond localhost
  5. Inspect JSON-RPC traffic logs for suspicious SQL patterns
    Review NetVault Backup application logs (typically in the installation logs directory) for JSON-RPC requests containing SQL operators, quotes, or SQL comments in parameters sent to the NVBURemovableMedia handler
    Affected if Logs show JSON-RPC requests with SQL injection patterns targeting NVBURemovableMedia

The environment is affected if Quest NetVault Backup is installed with a version lower than 14.0.2 and the NVBURemovableMedia JSON-RPC interface is network-accessible.

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

Apply vendor-provided patch immediately; until patch is available, restrict network access to NetVault Backup services and implement WAF rules to block SQL injection patterns in JSON-RPC traffic.

Recommended fix Moderate confidence

NetVault Backup 14.0.2

  1. 1. Check current NetVault Backup version by logging into the management console and navigating to About or System Information.
  2. 2. If version is below 14.0.2, create a complete backup of the NetVault Backup configuration and database.
  3. 3. Download NetVault Backup version 14.0.2 or later from Quest Support at support.quest.com.
  4. 4. Apply the upgrade following Quest's standard upgrade procedure for NetVault Backup.
  5. 5. After upgrade, verify the NVBURemovableMedia service is running correctly and confirm the new version is installed.
  6. 6. Test that backup and restore operations function normally after the upgrade.

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

Fix this in Netvault Backup Scoped from the published advisory
  • Consultation4.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
32.0 hours of engineering $5,600
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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-2026-9783 in production — separate from our analysis above.

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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