RCE in Quest Netvault Backup
CVE-2026-9787
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.055 (92.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.055 · newest: 0.055 · change: 0.000
Affected products
- Quest Netvault Backup — versions 14.0.0.19
- Quest Netvault Backup
Weakness classification (CWE)
References
- www.zerodayinitiative.com/advisories/ZDI-26-376/ (x_research-advisory, Vendor Advisory)
- support.quest.com/technical-documents/netvault/14.0.2/release-notes (vendor-advisory, Release Notes)
Frequently asked questions
- What is CVE-2026-9787?
- CVE-2026-9787 is a high-severity vulnerability in Quest Netvault Backup, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-06-25.
- How severe is CVE-2026-9787?
- High severity. CVSS v3 base score is 8.8 out of 10.