ZDI-26-373: Quest NetVault Backup NVBULibraryPort SQL Injection Remote Code Execution Vulnerability
Source Zero Day Initiative
Not known to be exploited.
Data as of 7 Nov 2026, 23:24 UTC
Rated Critical by Threat Radar from the Zero Day Initiative text · No CVSS score from NVD or the CNA
- EPSS
- 0.9% chance of exploitation in 30 days – higher than 61% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
Public on cve.org; its publication date is not in this record
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.
What to do
AI-suggested
Quest has issued an official update that corrects this vulnerability. Applying the vendor-provided patch or update is the recommended mitigation. No additional vendor-advised mitigations are stated.
Description
A critical SQL injection vulnerability in Quest NetVault Backup's NVBULibraryPort component allows remote attackers to execute arbitrary code. Exploitation requires authentication, but the authentication mechanism can be bypassed. The flaw stems from improper validation of user-supplied strings in JSON-RPC messages, enabling code execution with NETWORK SERVICE privileges. Quest has issued an update to address this issue.