CVE-2026-9780
8.8 · HIGHOverview
CVE-2026-9780 is a high-severity vulnerability affecting quest netvault_backup. It was published on June 25, 2026 and has a CVSS 3.0 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from quest. Update netvault_backup to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| quest | netvault_backup | >= 0, < 14.0.2 | Affected |
Frequently Asked Questions
What is CVE-2026-9780?
CVE-2026-9780 is a high-severity vulnerability affecting quest netvault_backup. It was published on June 25, 2026 and has a CVSS 3.0 base score of 8.8 (HIGH).
How severe is CVE-2026-9780?
This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-9780?
Check the references section for vendor advisories and patches from quest. Update netvault_backup to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-9780?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-9780 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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