Quest NetVault Backup 14.0.1.7 cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in Quest NetVault Backup 14.0.1.7. This affects an unknown function. The manipulation leads to cross site scripting. This vulnerability is documented as CVE-2026-9780. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Quest NetVault Backup 14.0.1.7. This issue affects an unknown code. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

Quest NetVault Backup addclient3 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 addclient3 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-27666.

The advisory is shared at zerodayinitiative.com. The identification of this vulnerability is CVE-2026-9780 since 05/28/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Backup Software

Vendor

• Quest

Name

• NetVault Backup

Version

• 14.0.1.7

License

• commercial

Website

• Vendor: https://www.quest.com/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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