{
    "id": "CVE-2015-1635",
    "published": "2015-04-14 20:59:01",
    "last_modified": "2026-06-17 00:22:44",
    "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-94",
    "description": "HTTP.sys in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1, and Windows Server 2012 Gold and R2 allows remote attackers to execute arbitrary code via crafted HTTP requests, aka \"HTTP.sys Remote Code Execution Vulnerability.\"",
    "epss_score": "0.99999",
    "epss_percentile": "0.99998",
    "kev": 1,
    "kev_due": "2022-08-10",
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:19:52",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-08-10."
    },
    "products": [
        {
            "vendor": "microsoft",
            "product": "windows_7"
        },
        {
            "vendor": "microsoft",
            "product": "windows_8"
        },
        {
            "vendor": "microsoft",
            "product": "windows_8.1"
        },
        {
            "vendor": "microsoft",
            "product": "windows_server_2008"
        },
        {
            "vendor": "microsoft",
            "product": "windows_server_2012"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2015-1635",
        "date_added": "2022-02-10",
        "due_date": "2022-08-10",
        "vendor": "Microsoft",
        "product": "HTTP.sys",
        "name": "Microsoft HTTP.sys Remote Code Execution Vulnerability",
        "ransomware": 0
    },
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "36776",
            "title": "Microsoft Windows - 'HTTP.sys' HTTP Request Parsing Denial of Service (MS15-034)",
            "date": "2015-04-16",
            "url": "https://www.exploit-db.com/exploits/36776"
        },
        {
            "source": "exploit-db",
            "ref_id": "36773",
            "title": "Microsoft Windows - 'HTTP.sys' (PoC) (MS15-034)",
            "date": "2015-04-15",
            "url": "https://www.exploit-db.com/exploits/36773"
        }
    ],
    "refs_list": [
        "http://packetstormsecurity.com/files/131463/Microsoft-Windows-HTTP.sys-Proof-Of-Concept.html",
        "http://www.osvdb.org/120629",
        "http://www.securityfocus.com/bid/74013",
        "http://www.securitytracker.com/id/1032109",
        "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-034",
        "https://www.exploit-db.com/exploits/36773/",
        "https://www.exploit-db.com/exploits/36776/",
        "http://packetstormsecurity.com/files/131463/Microsoft-Windows-HTTP.sys-Proof-Of-Concept.html",
        "http://www.osvdb.org/120629",
        "http://www.securityfocus.com/bid/74013",
        "http://www.securitytracker.com/id/1032109",
        "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-034",
        "https://www.exploit-db.com/exploits/36773/",
        "https://www.exploit-db.com/exploits/36776/",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-1635"
    ]
}