# CVE-2026-7569: Quest NetVault Backup XSS authentication bypass in viewclient

Source: https://junglewise.ai/threats/cve-2026-7569-quest-netvault-backup-xss-authentication-bypass-in-viewclient  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-25. Updated: 2026-06-25  
License: CC BY 4.0 with a link back

CVE-2026-7569 · Severity: high · CVSS 8.8 · Published 2026-06-25

Quest NetVault Backup is a data protection solution used to back up and recover enterprise data across physical and virtual environments. A security flaw in its web interface allows a remote attacker to bypass authentication if a legitimate user is tricked into visiting a malicious link. This could allow an attacker to gain unauthorized access to the backup system and potentially execute commands with high-level system privileges, risking data loss or full system compromise.

Technologies: [Quest NetVault Backup](https://junglewise.ai/threats/technologies/netvault-backup). Vendors: [Quest](https://junglewise.ai/threats/vendors/quest).

## Quick answers

**Is CVE-2026-7569 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-7569 being exploited in the wild.

**How severe is CVE-2026-7569?** High severity, with a CVSS score of 8.8, published 25 June 2026.

**Which products and versions are affected?** Quest NetVault Backup 14.0.1.7.

**Is there a fix for CVE-2026-7569?** A patch was published on 2026-06-24: Coordinated public release of advisory and update Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-7569 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-7569?** Check whether you run Quest NetVault Backup at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A Cross-Site Scripting (XSS) vulnerability exists in the 'viewclient' webpage of Quest NetVault Backup due to insufficient validation of user-supplied data. A remote, unauthenticated attacker can exploit this by enticing a user to visit a specially crafted URL or open a malicious file, leading to the execution of arbitrary script code in the victim's browser session. This script execution can be leveraged to bypass authentication mechanisms. When combined with other vulnerabilities, this flaw allows for arbitrary code execution with SYSTEM privileges. The issue is addressed in NetVault version 14.0.2.

## Affected products

- Quest NetVault Backup 14.0.1.7

## Timeline

- 2025-10-03: disclosed: Vulnerability reported to vendor
- 2026-06-24: patched: Coordinated public release of advisory and update
- 2026-06-25: advisory: NVD publication date

## References

- [https://support.quest.com/technical-documents/netvault/14.0.2/release-notes](https://support.quest.com/technical-documents/netvault/14.0.2/release-notes)
- [https://www.zerodayinitiative.com/advisories/ZDI-26-377/](https://www.zerodayinitiative.com/advisories/ZDI-26-377/)

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