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 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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Quest | NetVault Backup | unknown |
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Advisories
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Fixes
Solution
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Workaround
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References
History
Wed, 24 Jun 2026 23:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Quest NetVault Backup addclient3 Cross-Site Scripting Authentication Bypass Vulnerability | |
| Weaknesses | CWE-79 | |
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| Metrics |
cvssV3_0
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Projects
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MITRE
Status: PUBLISHED
Assigner: zdi
Published:
Updated: 2026-06-24T23:13:55.522Z
Reserved: 2026-05-27T22:27:43.798Z
Link: CVE-2026-9780
Vulnrichment
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Weaknesses