CVE-2026-9782 in NetVault Backup
Summary
by MITRE • 06/25/2026
Quest NetVault Backup NVBUDeviceDrive 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 NVBUDeviceDrive 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-27633.
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Analysis
by VulDB Data Team • 06/25/2026
The Quest NetVault Backup NVBUDeviceDrive SQL injection vulnerability represents a critical security weakness that enables remote code execution through improper input validation mechanisms. This vulnerability resides within the JSON-RPC message processing functionality of the backup software, specifically in how the system handles user-supplied data when constructing database queries. The flaw stems from insufficient sanitization of input parameters that are directly incorporated into SQL command structures without adequate validation or escaping mechanisms.
The technical exploitation of this vulnerability occurs through the manipulation of NVBUDeviceDrive JSON-RPC messages where attacker-controlled data is processed without proper security controls. When the system receives these malformed requests, it fails to validate or sanitize the user-supplied strings before incorporating them into SQL queries. This creates an environment where malicious input can alter the intended execution flow of database commands, potentially allowing attackers to inject arbitrary SQL code that executes with the privileges of the NETWORK SERVICE account.
From an operational perspective, this vulnerability presents significant risk to organizations relying on Quest NetVault Backup systems as it allows for remote code execution without requiring elevated privileges beyond basic authentication. The existing authentication mechanism can be bypassed, meaning that even if initial access requires credentials, the vulnerability itself can be exploited regardless of authentication state. This creates a scenario where unauthorized actors can leverage the system's legitimate network services to execute malicious payloads, potentially leading to full system compromise or data exfiltration.
The attack vector for this vulnerability aligns with common exploitation patterns identified in the cybersecurity landscape, particularly those targeting database interaction components within enterprise backup solutions. The weakness demonstrates poor input validation practices that are commonly classified under CWE-89 SQL Injection, which is a well-established category of vulnerabilities in the Common Weakness Enumeration catalog. This vulnerability also maps to several ATT&CK tactics including execution through command and script injection techniques that allow adversaries to run malicious code on target systems.
Organizations should implement immediate mitigations including applying vendor patches when available, implementing network segmentation to limit access to backup systems, and strengthening authentication mechanisms beyond basic credential requirements. Additional protective measures include monitoring for unusual JSON-RPC activity patterns, implementing input validation at multiple layers of the application architecture, and conducting regular security assessments of backup infrastructure components. The vulnerability's classification as a remote code execution issue warrants comprehensive network monitoring and incident response preparedness to detect potential exploitation attempts.
Security professionals should note that this vulnerability represents a typical example of how insufficient input validation in database interaction components can lead to severe consequences, particularly when combined with authentication bypass capabilities. The fact that execution occurs in the NETWORK SERVICE context means that successful exploitation could provide attackers with limited but potentially useful system access privileges for further compromise activities.