Vulnerability · Published Jun 24, 2026 · Assigned by zdi

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

High 8.8

In plain English

A high-severity OS command injection in NetVault Backup from Quest. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 5.5% (higher than 93% of all known vulnerabilities).

Severity (CVSS 3.0)8.8High

Exploit odds (30 days)5.5%top 7.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Quest	NetVault Backup	14.0.0.19

Weakness: CWE-78 · Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

ZDI-26-376 x_research-advisory
vendor-provided URL vendor-advisory