A stack-based buffer overflow vulnerability in the VPN Clients on the ADM_CVE-2026-6643

{
    "lastseen": "",
    "description": "A stack-based buffer overflow vulnerability was found in the VPN Clients on the ADM. The issue stems from the use of unbounded sscanf() and passing user-controlled data directly to printf(). Due to the lack of PIE and Stack Canary protections, an authenticated remote attacker can exploit these to execute arbitrary code as the web server user. \nAffected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RR42 as well as from ADM 5.0.0 through ADM 5.1.2.REO1.",
    "published": "2026-04-20T06:34:27.511Z",
    "modified": "2026-04-20T06:34:27.511Z",
    "type": "cve",
    "title": "A stack-based buffer overflow vulnerability in the VPN Clients on the ADM",
    "source": "ASUSTOR1",
    "references": "https://www.asustor.com/security/security_advisory_detail?id=54",
    "id": "CVE-2026-6643",
    "bulletinFamily": "",
    "cwe": [
        "CWE-121"
    ],
    "cvelist": null,
    "sourceData": "ASUSTOR Inc. ADM 4.1.0\nASUSTOR Inc. ADM 5.0.0",
    "sourceHref": "",
    "cvss": {
        "score": 8.6,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L",
        "version": "4.0"
    },
    "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": "ADM",
    "version": "4.1.0",
    "vendor": "ASUSTOR Inc.",
    "ai_description": "A stack-based buffer overflow vulnerability in the VPN Clients on the ADM, allowing authenticated remote attackers to execute arbitrary code as the web server user.",
    "ai_severity": "High",
    "ai_vendor": "ASUSTOR Inc.",
    "ai_product": "ADM",
    "ai_version": "4.1.0-4.3.3.RR42, 5.0.0-5.1.2.REO1",
    "ai_score": 8.6
}