CVE-2026-7569CWE-79

Quest NetVault Backup viewclient Cross-Site Scripting Authentication Bypass Vulnerability

High · published June 24, 2026

CVSS v3.0
8.8
EPSS
1%
Percentile
60.4
In the wild
Unconfirmed
What it is

Quest NetVault Backup viewclient Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of Quest NetVault Backup. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the viewclient webpage. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-28202.

The record
Technical detail
CVSS v3.0
8.8 · HIGH
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00935 · 60.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-24T23:15Z
EPSS history
Timeline
  • 24 JUN 23:15Z
    Quest NetVault Backup viewclient Cross-Site Scripting Authentication Bypass Vulnerability
    cvelistv5