CVE-2026-9785
Received Received - Intake
SQL Injection in Quest NetVault Backup

Publication date: 2026-06-25

Last updated on: 2026-06-25

Assigner: Zero Day Initiative

Description
Quest NetVault Backup NVBULibrarySlot 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 NVBULibrarySlot 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-27630.
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Meta Information
Published
2026-06-25
Last Modified
2026-06-25
Generated
2026-06-25
AI Q&A
2026-06-25
EPSS Evaluated
N/A
NVD
CVE-2026-9785
EUVD
EUVD-2026-39146
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
quest netvault_backup to 2026-06-24 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.
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Executive Summary

CVE-2026-9785 is a remote code execution vulnerability in Quest NetVault Backup. It arises from improper validation of user-supplied strings in NVBULibrarySlot JSON-RPC messages, which are used to construct SQL queries. This flaw allows attackers to bypass authentication and execute arbitrary code in the context of the NETWORK SERVICE account.

Impact Analysis

This vulnerability can have a severe impact as it allows remote attackers to execute arbitrary code on affected systems without proper authentication. Exploiting this flaw could lead to full compromise of the Quest NetVault Backup installation, potentially allowing attackers to control backup operations, access sensitive data, or disrupt services.

Mitigation Strategies

To mitigate this vulnerability, you should apply the update released by Quest that addresses the issue.

Since the vulnerability allows remote code execution by bypassing authentication through improper validation of NVBULibrarySlot JSON-RPC messages, updating the software to the patched version is critical.

Compliance Impact

The provided information does not specify how CVE-2026-9785 affects compliance with common standards and regulations such as GDPR or HIPAA.

Detection Guidance

This vulnerability involves improper validation of user-supplied strings in NVBULibrarySlot JSON-RPC messages, which can be exploited to execute arbitrary code. Detection would typically involve monitoring for unusual or unauthorized JSON-RPC requests targeting NVBULibrarySlot functionality on Quest NetVault Backup installations.

Since the vulnerability allows bypassing authentication, network traffic analysis focusing on JSON-RPC messages to the NetVault Backup server could help identify suspicious activity.

However, no specific detection commands or signatures are provided in the available resources.

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