Quest NetVault Backup addclient3 Cross-Site Scripting Authentication Bypass Vulnerability_CVE-2026-9780

{
    "lastseen": "",
    "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.\n\nThe 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.",
    "published": "2026-06-24T23:13:55.522Z",
    "modified": "2026-06-24T23:13:55.522Z",
    "type": "cve",
    "title": "Quest NetVault Backup addclient3 Cross-Site Scripting Authentication Bypass Vulnerability",
    "source": "zdi",
    "references": "https://www.zerodayinitiative.com/advisories/ZDI-26-369/\nhttps://support.quest.com/technical-documents/netvault/14.0.2/release-notes#TOPIC-2338529",
    "id": "CVE-2026-9780",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "Quest NetVault Backup 14.0.1.7",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
        "version": "3.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "NetVault Backup",
    "version": "14.0.1.7",
    "vendor": "Quest",
    "ai_description": "Cross-Site Scripting Authentication Bypass Vulnerability in Quest NetVault Backup allowing remote attackers to bypass authentication and potentially execute arbitrary code",
    "ai_severity": "High",
    "ai_vendor": "Quest",
    "ai_product": "NetVault Backup",
    "ai_version": "14.0.1.7",
    "ai_score": 8.8
}