{
    "id": "CVE-2006-6696",
    "published": "2006-12-22 02:28:00",
    "last_modified": "2026-06-16 22:33:37",
    "cvss_score": "6.9",
    "cvss_severity": "MEDIUM",
    "cvss_version": "2.0",
    "cvss_vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
    "cwe": "CWE-119",
    "description": "Double free vulnerability in Microsoft Windows 2000, XP, 2003, and Vista allows local users to gain privileges by calling the MessageBox function with a MB_SERVICE_NOTIFICATION message with crafted data, which sends a HardError message to Client/Server Runtime Server Subsystem (CSRSS) process, which is not properly handled when invoking the UserHardError and GetHardErrorText functions in WINSRV.DLL.",
    "epss_score": "0.03414",
    "epss_percentile": "0.88509",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-03 18:17:06",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "microsoft",
            "product": "windows_2000"
        },
        {
            "vendor": "microsoft",
            "product": "windows_2003_server"
        },
        {
            "vendor": "microsoft",
            "product": "windows_vista"
        },
        {
            "vendor": "microsoft",
            "product": "windows_xp"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "3024",
            "title": "Microsoft Windows - NtRaiseHardError 'Csrss.exe' Memory Disclosure",
            "date": "2006-12-27",
            "url": "https://www.exploit-db.com/exploits/3024"
        },
        {
            "source": "exploit-db",
            "ref_id": "2967",
            "title": "Microsoft Windows - 'MessageBox' Memory Corruption Local Denial of Service",
            "date": "2006-12-20",
            "url": "https://www.exploit-db.com/exploits/2967"
        }
    ],
    "refs_list": [
        "http://blogs.technet.com/msrc/archive/2006/12/22/new-report-of-a-windows-vulnerability.aspx",
        "http://groups.google.ca/group/microsoft.public.win32.programmer.kernel/browse_thread/thread/c5946bf40f227058/7bd7b5d66a4e5aff",
        "http://isc.sans.org/diary.php?n&storyid=1965",
        "http://lists.grok.org.uk/pipermail/full-disclosure/2006-December/051394.html",
        "http://research.eeye.com/html/alerts/zeroday/20061215.html",
        "http://secunia.com/advisories/23448",
        "http://securitytracker.com/id?1017433",
        "http://www.determina.com/security.research/vulnerabilities/csrss-harderror.html",
        "http://www.kuban.ru/forum_new/forum2/files/19124.html",
        "http://www.security.nnov.ru/Gnews944.html",
        "http://www.security.nnov.ru/files/messagebox.c",
        "http://www.securityfocus.com/archive/1/455061/100/0/threaded",
        "http://www.securityfocus.com/archive/1/455088/100/0/threaded",
        "http://www.securityfocus.com/archive/1/455104/100/0/threaded",
        "http://www.securityfocus.com/archive/1/455158/100/0/threaded",
        "http://www.securityfocus.com/archive/1/455546/100/0/threaded",
        "http://www.securityfocus.com/archive/1/466331/100/200/threaded",
        "http://www.securityfocus.com/bid/21688",
        "http://www.securityfocus.com/bid/23324",
        "http://www.vupen.com/english/advisories/2006/5120",
        "http://www.vupen.com/english/advisories/2007/1325",
        "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-021",
        "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1816",
        "http://blogs.technet.com/msrc/archive/2006/12/22/new-report-of-a-windows-vulnerability.aspx",
        "http://groups.google.ca/group/microsoft.public.win32.programmer.kernel/browse_thread/thread/c5946bf40f227058/7bd7b5d66a4e5aff"
    ]
}