CVE-2026-7569: Quest NetVault Backup viewclient Cross-Site Scripting
CVE-2026-7569 analysis covering impact, affected products, versions, remediation, and cross-checked defender guidance.
CVE-2026-7569 is a vulnerability published by NVD on 6/25/2026.
What happened
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.
Affected products and versions
- quest netvault backup unspecified version (before 14.0.2)
Severity and weakness
CVSS: HIGH 8.8. Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Weaknesses: CWE-79.
Known exploitation
No CISA KEV entry is currently attached to the NVD record.
What defenders should do
- Identify whether the affected product and version range exists in production.
- Review vendor advisories and release notes before change windows.
- Patch, upgrade, disable the vulnerable component, or apply vendor mitigations.
- Verify the running version after deployment, not only the package inventory.
Official and supporting references
- https://support.quest.com/technical-documents/netvault/14.0.2/release-notes#TOPIC-2338529
- https://www.zerodayinitiative.com/advisories/ZDI-26-377/