---
id: CVE-2026-13270
title: Quest NetVault Backup nvpmgr Integer Underflow Denial-of-Service Vulnerability
summary: >-
  Quest NetVault Backup nvpmgr Integer Underflow Denial-of-Service
  Vulnerability. This vulnerability allows remote attackers to create a
  denial-of-service condition on affected installations of Quest NetVault
  Backup. Authentication is not …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-191
vendor: Quest
product: NetVault Backup
affected:
  - netvault_backup 14.0.2.4
published: '2026-11-12'
updated: '2026-11-12'
sourceUpdated: '2026-11-12T02:49:34.234Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-13270'
references:
  - url: 'https://www.zerodayinitiative.com/advisories/ZDI-26-889/'
    label: ZDI-26-889
tags:
  - cve.org
zeroDay: true
ingestedAt: '2026-11-12T03:35:25.466Z'
epss: 0.00799
epssPercentile: 0.57023
---

## Overview

Quest NetVault Backup nvpmgr Integer Underflow Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Quest NetVault Backup. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the nvpmgr service, which listens on UDP port 20031 by default. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before allocating a buffer. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-28744.

## Affected

- `netvault_backup 14.0.2.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.