CVE-2026-9787 Quest NetVault Backup NVBULogDaemon Command Injection Remote Code Execution Vulnerability

High 8.8 Published 24 Jun 2026 Updated 26 Jun 2026

Remote attackers can execute arbitrary code as SYSTEM via command injection in NVBULogDaemon, bypassing authentication.

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-2026-9787?

CVE-2026-9787 is a high-severity command 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 NVBULogDaemon Command 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 NVBULogDaemon JSON-RPC messages. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-27625.

Weakness: CWE-78

Which versions are affected by CVE-2026-9787?

It affects 1 product.

Products include Quest Netvault Backup.

How do I fix CVE-2026-9787?

No fix has been published for CVE-2026-9787 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2026-9787 being exploited?

There is no known exploitation of CVE-2026-9787 in the wild and no public exploit code.

Sources

Also known as GHSA-g493-6gcx-x935.