CVE-2026-9784 Quest NetVault Backup NVBULibraryPort SQL Injection Remote Code Execution Vulnerability

High 8.8 Published 24 Jun 2026 Updated 26 Jun 2026

Remote attackers can execute arbitrary code via SQL injection in NetVault Backup, bypassing authentication to gain NETWORK SERVICE privileges.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-9784?

CVE-2026-9784 is a high-severity SQL injection vulnerability in Quest NetVault Backup, published on 24 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Quest NetVault Backup NVBULibraryPort 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 NVBULibraryPort 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-27631.

Weakness: CWE-89

Which versions are affected by CVE-2026-9784?

It affects 1 product.

Products include Quest Netvault Backup.

How do I fix CVE-2026-9784?

No fix has been published for CVE-2026-9784 yet. Limit exposure of the affected software until one is available.

Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.

Is CVE-2026-9784 being exploited?

There is no known exploitation of CVE-2026-9784 in the wild and no public exploit code.

Sources

Also known as GHSA-qrh4-m2m7-cgg3.