ZDI-26-377: Quest NetVault Backup viewclient Cross-Site Scripting Authentication Bypass Vulnerability
A cross-site scripting (XSS) vulnerability in the viewclient webpage of Quest NetVault Backup allows remote attackers to bypass authentication. Exploitation requires user interaction, such as visiting a malicious page or opening a malicious file. The vulnerability stems from improper validation of user-supplied data, enabling script injection. Quest has issued an update to address this issue.
AI Analysis
Technical Summary
CVE-2026-7569 is a remote authentication bypass vulnerability in Quest NetVault Backup's viewclient webpage caused by insufficient validation of user input, leading to cross-site scripting. An attacker can exploit this by tricking a user into visiting a malicious page or opening a malicious file, potentially executing arbitrary code with SYSTEM privileges when combined with other vulnerabilities. Quest has released an update to fix this vulnerability.
Potential Impact
Successful exploitation allows remote attackers to bypass authentication and potentially execute arbitrary code with SYSTEM privileges in the context of Quest NetVault Backup. This can lead to full compromise of the affected system. User interaction is required for exploitation.
Mitigation Recommendations
Quest has issued an official update that corrects this vulnerability. Users should apply the update as detailed in the vendor's release notes at https://support.quest.com/technical-documents/netvault/14.0.2/release-notes#TOPIC-2338529. Applying this update mitigates the risk without requiring additional actions.
ZDI-26-377: Quest NetVault Backup viewclient Cross-Site Scripting Authentication Bypass Vulnerability
Description
A cross-site scripting (XSS) vulnerability in the viewclient webpage of Quest NetVault Backup allows remote attackers to bypass authentication. Exploitation requires user interaction, such as visiting a malicious page or opening a malicious file. The vulnerability stems from improper validation of user-supplied data, enabling script injection. Quest has issued an update to address this issue.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-7569 is a remote authentication bypass vulnerability in Quest NetVault Backup's viewclient webpage caused by insufficient validation of user input, leading to cross-site scripting. An attacker can exploit this by tricking a user into visiting a malicious page or opening a malicious file, potentially executing arbitrary code with SYSTEM privileges when combined with other vulnerabilities. Quest has released an update to fix this vulnerability.
Potential Impact
Successful exploitation allows remote attackers to bypass authentication and potentially execute arbitrary code with SYSTEM privileges in the context of Quest NetVault Backup. This can lead to full compromise of the affected system. User interaction is required for exploitation.
Mitigation Recommendations
Quest has issued an official update that corrects this vulnerability. Users should apply the update as detailed in the vendor's release notes at https://support.quest.com/technical-documents/netvault/14.0.2/release-notes#TOPIC-2338529. Applying this update mitigates the risk without requiring additional actions.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-377/","fetched":true,"fetchedAt":"2026-06-24T22:24:49.305Z","wordCount":214}
- Classification
- {"confidence":0.95,"severitySource":"heuristic","classifier":"rss-v2"}
Threat ID: 6a3c59a24853345fc1ee965c
Added to database: 06/24/2026, 22:26:42 UTC
Last enriched: 07/23/2026, 23:12:47 UTC
Last updated: 08/06/2026, 00:41:15 UTC
Views: 85
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