{
    "id": "CVE-2014-1776",
    "published": "2014-04-27 10:55:03",
    "last_modified": "2026-06-17 00:05:32",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-416",
    "description": "Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014.  NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that \"VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks.\"",
    "epss_score": "0.82682",
    "epss_percentile": "0.99658",
    "kev": 1,
    "kev_due": "2022-07-28",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:19:14",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-07-28."
    },
    "products": [
        {
            "vendor": "microsoft",
            "product": "internet_explorer"
        },
        {
            "vendor": "microsoft",
            "product": "windows_7"
        },
        {
            "vendor": "microsoft",
            "product": "windows_8"
        },
        {
            "vendor": "microsoft",
            "product": "windows_8.1"
        },
        {
            "vendor": "microsoft",
            "product": "windows_rt"
        },
        {
            "vendor": "microsoft",
            "product": "windows_rt_8.1"
        },
        {
            "vendor": "microsoft",
            "product": "windows_server_2003"
        },
        {
            "vendor": "microsoft",
            "product": "windows_server_2008"
        },
        {
            "vendor": "microsoft",
            "product": "windows_server_2012"
        },
        {
            "vendor": "microsoft",
            "product": "windows_vista"
        },
        {
            "vendor": "microsoft",
            "product": "windows_xp"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2014-1776",
        "date_added": "2022-01-28",
        "due_date": "2022-07-28",
        "vendor": "Microsoft",
        "product": "Internet Explorer",
        "name": "Microsoft Internet Explorer Memory Corruption Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx",
        "http://secunia.com/advisories/57908",
        "http://securitytracker.com/id?1030154",
        "http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html",
        "http://www.kb.cert.org/vuls/id/222929",
        "http://www.osvdb.org/106311",
        "http://www.securityfocus.com/bid/67075",
        "http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/",
        "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021",
        "https://technet.microsoft.com/library/security/2963983",
        "http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx",
        "http://secunia.com/advisories/57908",
        "http://securitytracker.com/id?1030154",
        "http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html",
        "http://www.kb.cert.org/vuls/id/222929",
        "http://www.osvdb.org/106311",
        "http://www.securityfocus.com/bid/67075",
        "http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/",
        "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021",
        "https://technet.microsoft.com/library/security/2963983",
        "https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script",
        "https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776"
    ]
}