Quest NetVault Backup addclient3 Cross-Site Scripting Authentication Bypass Vulnerability
Published Jun 24, 2026
8.8
HIGHCVSS 3.0
EPSS 0.94%
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.
Affected products
-
- Version 14.0.1.7StatusaffectedConstraints-
- Version
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 | n/a |
|
- < 14.0.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (3)
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39140 Advisory
- https://support.quest.com/technical-documents/netvault/14.0.2/release-notes#TOPIC-2338529 vendor-advisoryRelease Notes
- https://www.zerodayinitiative.com/advisories/ZDI-26-369/ x_research-advisoryVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39140 | Advisory | |
| https://support.quest.com/technical-documents/netvault/14.0.2/release-notes#TOPIC-2338529 | vendor-advisoryRelease Notes | |
| https://www.zerodayinitiative.com/advisories/ZDI-26-369/ | x_research-advisoryVendor Advisory |
Change history (0)
No recorded changes yet.