{
    "id": "CVE-2010-3971",
    "published": "2010-12-22 21:00:17",
    "last_modified": "2026-06-16 23:23:55",
    "cvss_score": "9.3",
    "cvss_severity": "HIGH",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
    "cwe": "CWE-399",
    "description": "Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style Sheets (CSS) parser in mshtml.dll, as used in Microsoft Internet Explorer 6 through 8 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a self-referential @import rule in a stylesheet, aka \"CSS Memory Corruption Vulnerability.\"",
    "epss_score": "0.81663",
    "epss_percentile": "0.99635",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:17:53",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "microsoft",
            "product": "internet_explorer"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "16533",
            "title": "Microsoft Internet Explorer - CSS Recursive Import Use-After-Free (MS11-003) (Metasploit)",
            "date": "2011-02-08",
            "url": "https://www.exploit-db.com/exploits/16533"
        },
        {
            "source": "exploit-db",
            "ref_id": "15746",
            "title": "Microsoft Internet Explorer 8 - CSS Parser",
            "date": "2010-12-15",
            "url": "https://www.exploit-db.com/exploits/15746"
        },
        {
            "source": "exploit-db",
            "ref_id": "15708",
            "title": "Microsoft Internet Explorer 8 - CSS Parser Denial of Service",
            "date": "2010-12-08",
            "url": "https://www.exploit-db.com/exploits/15708"
        }
    ],
    "refs_list": [
        "http://blogs.technet.com/b/srd/archive/2011/01/07/assessing-the-risk-of-public-issues-currently-being-tracked-by-the-msrc.aspx",
        "http://seclists.org/fulldisclosure/2010/Dec/110",
        "http://secunia.com/advisories/42510",
        "http://support.avaya.com/css/P8/documents/100127294",
        "http://www.breakingpointsystems.com/community/blog/ie-vulnerability/",
        "http://www.exploit-db.com/exploits/15708",
        "http://www.exploit-db.com/exploits/15746",
        "http://www.kb.cert.org/vuls/id/634956",
        "http://www.microsoft.com/technet/security/advisory/2488013.mspx",
        "http://www.securityfocus.com/bid/45246",
        "http://www.securitytracker.com/id?1024922",
        "http://www.vupen.com/english/advisories/2010/3156",
        "http://www.vupen.com/english/advisories/2011/0318",
        "http://www.wooyun.org/bugs/wooyun-2010-0885",
        "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-003",
        "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12382",
        "http://blogs.technet.com/b/srd/archive/2011/01/07/assessing-the-risk-of-public-issues-currently-being-tracked-by-the-msrc.aspx",
        "http://seclists.org/fulldisclosure/2010/Dec/110",
        "http://secunia.com/advisories/42510",
        "http://support.avaya.com/css/P8/documents/100127294",
        "http://www.breakingpointsystems.com/community/blog/ie-vulnerability/",
        "http://www.exploit-db.com/exploits/15708",
        "http://www.exploit-db.com/exploits/15746",
        "http://www.kb.cert.org/vuls/id/634956",
        "http://www.microsoft.com/technet/security/advisory/2488013.mspx"
    ]
}